Microsoft 365 Support Services in London

Outlook, Word, Teams, SharePoint — Microsoft 365 powers the way modern businesses work, with over 40 apps designed to boost productivity and collaboration. But without expert setup and support, it can create confusion, security risks, and missed opportunities.

Sereno is a trusted IT support provider that offers a comprehensive range of services, including Microsoft 365 support. We help London SMEs take full control of Microsoft 365, optimising setup, securing data, and ensuring your team gets the most from every tool.

Our Microsoft 365 support team provides professional assistance with migrations, user management, system monitoring, updates, and more so that your staff can focus on what they’re supposed to — achieving your business goals.

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Microsoft 365 logo with icons of Word, Excel, Teams, PowerPoint, Outlook, OneDrive, and Defender – representing managed Microsoft 365 support services for businesses.

Our Microsoft Office 365 support services

If you’re looking for professional Microsoft support in London, the team at Sereno can help. Our Microsoft 365 consultants have years of experience providing professional support with Microsoft products for businesses across various sectors. Our Microsoft Office 365 services include:

Installing and configuring Microsoft 365 applications

Migration to Microsoft 365

Integrating Microsoft 365 with third-party tools

Email support

User access management

Handling updates and patches

Securing Microsoft 365 environments

User training and ongoing support

Payments and billing

Benefits of Microsoft Office 365

Seamless Collaboration

Microsoft Office 365 provides a cloud-based suite of tools designed to enable teams to collaborate seamlessly no matter where they are, which is critical to modern workplaces. Microsoft Teams lets you collaborate in real time, communicate through chat or video, and share files, while OneDrive and SharePoint ensure that your files are always up to date and can be effortlessly accessed by users regardless of their location.

High Productivity

It’s safe to say that Teams, Word, Excel, PowerPoint, Outlook, and other applications within the Microsoft Office suite are industry standards for productivity, enabling users to create, communicate, and collaborate efficiently across devices and locations. Microsoft Office 365 applications include robust AI features that automate routine tasks, analyze data patterns, deliver personalized suggestions, and improve writing, ultimately enhancing your team’s overall productivity.

Advanced Security

The Microsoft Office 365 suite was built with advanced security features to help organizations protect their data and stay compliant with regulations. Built-in encryption, multi-factor authentication, mobile device management, data loss prevention, threat detection, and other tools shield your sensitive information from unauthorized access. In addition, you can set custom access permissions and monitor usage to detect any suspicious activity early, ensuring ultimate data security.

Scalability & Flexibility

One of the key benefits of Microsoft Office 365 is its unmatched scalability and flexibility. Regardless of the size of your business, the suite can be effortlessly adapted to suit your unique needs and requirements. Microsoft 365 subscription plans cater to various scenarios, from an individual user to a large business, allowing you to seamlessly add users and upgrade your plan as your needs evolve.

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Why Choose Sereno IT for Microsoft 365 Support in London?

Extensive Experience

With years of experience and a proven track record, Sereno is a go-to Microsoft 365 support services London provider. As a trusted managed IT services partner, we’ve helped multiple businesses across a variety of industries to make the most of their Microsoft 365 subscriptions.

We're People-Focused

Your needs always come first with Sereno. Our experts will work with you to understand your specific requirements and offer cost-effective solutions to help your team work more efficiently across the Microsoft Office 365 ecosystem.

Proactive Approach

You get more than expert technical support with our Microsoft 365 services. At Sereno, we take a proactive approach to managing your platform — our engineers monitor, maintain, and fine-tune the suite to prevent issues before they impact productivity.

Fast Resolution Times

When something goes wrong, your team doesn’t have time to wait. Our dedicated support specialists are committed to efficiently resolving your Microsoft 365 issues, minimizing downtime and getting your users back on track as fast as possible.

TESTIMONIALS

Our Happy Clients

5.0
Based on 59 reviews
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AJ Shazad
11:26 23 Apr 25
I have known Sereno (and their previous business) since 2016 as they are the IT solutions providers of our private credit fund with complex operations. Sereno are exceptional in solving issues in a prompt manner. Most recently I have dealt with Sahaj who set me up on the company IT infrastructure within few hours which can take days in a similar business with the complexity that the fund has. Furthermore, Sahaj resolved more issues for me with 2fa, mobile and security set-ups. Team members are available as soon as an issue pops up and generally relationship is managed by a single person making things streamlined with the single person with all knowledge of issues and set-ups to date. I would highly recommend Sereno based on my personal experience of them solving multiple problems for me at the credit fund.
Tim Field
10:21 22 Apr 25
Great company, very efficient with some wonderful individuals supporting
Scott Simmons
08:31 22 Apr 25
We have used Sereno for our IT support since May 2023 and find the team to be quick, informative and clear in terms of describing any work carried out to laptops etc. Highly recommended
Adam Wright
13:16 17 Apr 25
We've been working with Sereno for 18 months now and have been impressed by their solution oriented approach. Supporting us well with longer-term planning and day-to-day fixes. Recommend.
MB
12:15 17 Apr 25
Great service, rapid response time, friendly, professional technicians - couldn’t be better. Very glad we switched providers.
Daljit Sumal (GT)
11:42 17 Apr 25
Amazing service as always. x Had a few queries which were dealt with swiftly and calmly. x
Zoe Roberts
10:45 17 Apr 25
Kevin Williams
09:52 17 Apr 25
Sereno have always responded quicky to our requests/issues. Very polite and professional staff who keep you informed of progress of any problem solutions until fully resolved. I cannot recommend Sereno enough they offer a five star service.
Richard Martin
09:27 17 Apr 25
My company moved to Sereno IT over the new year and we have found the process not only to be painless but i would describe it as enjoyable. They have kept me and my team updated and in the process managed to save us money by developing our systems and removing unnecessary expenses on services that were no longer required. Great to find a partner that proactively works in the background with the best interests of my company at the forefront of their work.
Lauren Coyle
09:08 17 Apr 25
Annabelle Pugh
14:22 13 Dec 23
We have been clients of Sereno IT's since summer 2023 and we have been extremely happy with the service we have received to date. Sereno have built their business with a direct aim to fix the issues that are notoriously problematic with MSPs, and having experienced some of these problems with our previous MSP, Sereno are truly achieving in their efforts.

Everything is so streamlined and easy for clients to use - their partner portal has truly thought of everything, from ordering IT equipment, to scheduling calls with engineers. The team always make sure everything is very clearly explained, and when things are a little more technical/ difficult to put into an email, we have received personal video explanations which have been so useful.

Highly recommend Sereno's services!
Dana Ozola
12:41 07 Dec 23
These guys are new in the market, but they provide outstanding service service. What is important to our company, that they comprehend hierarchy of team and therefore importance despite the issue is applied. When we need something urgent, they find a manpower to resolve it asap. And most important for me as an assistant, i don't have to have IT language to explain the issue, they know issue is there and they find it and fix it - i do not have to answer 10 questions if i have done this or that, but they fix it by jumping on the system, with in short time all is done and you can move on with your day. And they are always positive 🙂
John Holmes
20:42 06 Dec 23
We have been a customer of Sereno since Summer 2023 and the experience since has been overwhelmingly positive. We are an SMB working in a complex, safety-critical industry, where stable and reliable IT services are paramount. Sereno have never let us down, with their team of highly competent, customer-focused technicians, who always go the extra mile.

As well as high quality services, they are also proactive in identifying areas for improvement and where they can add value. Compared to many other traditional IT suppliers, they are interested in establishing a true partnership, where the needs of both parties are taken into consideration.

I really can't recommended Sereno IT highly enough, as the other 5* reviews on here will also testify.
Alexander Moss
12:17 05 Dec 23
Great company, full of energy and very attentive to our needs. You really get a personalised service, with the technical ability of a much larger company.
James Goodwin
16:43 04 Dec 23
My business has recently adopted Sereno IT Support as our ITSM partner over the last quarter. This has been a sensible move for us as we scale, and the moving parts will become more complex as we grow. I have experienced a few issues, but these have been quickly addressed. One particular, tricky item involving my work mobile was a challenge - but, “We got there in the end! Thank you Tamim - your support has been very helpful and much appreciated”
Madeleine Barley
12:43 04 Dec 23
Excellent, speedy, friendly and very 'human' service. Intuitive and easy to use platform. I'm the type of person who normally puts off raising IT tickets but Sereno has actually changed that for me because it's so easy and straightforward, and everything gets actioned quickly.
Chris Needham
10:55 07 Jul 23
I've had the pleasure of working with Sereno for several months now, they are honestly absolutely fantastic. The service really is better than I have experienced from other support organisations.

The team is incredibly easy to work with. Everyone I have interacted with is friendly, seems to listen and is generally responsive. They also have a high level of understanding of industry specific problems which helps a lot.

We've has issues in the past with really slow response times but this an area where Sereno does really well. We're usually able to get an answer to queries within minutes, and resolutions within hours at most.

We have also used them for advisory services on security and are really happy with the results. It's been a much more efficient process than the in house team we have previously.

Highly recommend!

Case Study: How Sereno Helped Statons Estate Agent Transform Operations with Microsoft 365

Sereno IT worked closely with Statons to transform their IT operations into a modern, efficient, and scalable setup. The first step was addressing their outdated on-premises server, which was replaced with a secure, cloud-based storage solution using Microsoft SharePoint. This migration not only improved accessibility for staff working across six offices without the need for unreliable VPNs. This also eliminated the need for an expensive backup system, and allowed for a downgrade on firewalls, saving Statons approximately £40,000 over three years.

Statons Estate Agents office in North London, showcasing illuminated property listings and branded yellow storefront – featured in Sereno IT Support case study.

Frequently Asked Questions

Microsoft 365 is a cloud-based platform that includes popular productivity apps, such as Microsoft Teams, Word, Excel, PowerPoint, Outlook, OneDrive, and others. It offers 1 TB of cloud storage, AI-powered features, and can be used across desktops and mobile devices on various operating systems. Your files are securely stored on Microsoft’s hosted servers, which ensures reliable access, backups, and compliance.

Originally, Office 365 was a subscription-based service that comprised Microsoft Office apps (Word, Excel, Outlook, etc.) and cloud services like OneDrive and Exchange. In 2020, most Office 365 plans were rebranded under the Microsoft 365 name. Microsoft 365 includes everything Office 365 has, plus advanced security features, device management, and collaboration tools.

A Microsoft 365 subscription provides access to the full suite of Office apps, including Teams, Word, Excel, PowerPoint, and Outlook. It comes with 1 TB of OneDrive cloud storage per user and built-in security features. Depending on the plan, you may also get email hosting with Exchange, SharePoint for document management, and device management tools like Intune.

Sereno provides fully managed Microsoft 365 support as part of a long-term service. This means everything is taken care of — from initial setup to ongoing optimisation, security, and end-user support.

Our support includes:

  • Installing and configuring Microsoft 365 applications
    Full deployment of tools like Outlook, Teams, SharePoint, and OneDrive — tailored to your business needs.

  • Migration to Microsoft 365
    Seamless migration from your existing systems with minimal disruption and no data loss.

  • Integrating Microsoft 365 with third-party tools
    Connecting Microsoft 365 with other business apps to streamline workflows and increase productivity.

  • User access management
    Managing user roles, onboarding, permissions, and access controls — all aligned with security best practices.

  • Securing Microsoft 365 environments
    Implementing MFA, conditional access, SharePoint permissions, and data protection policies to safeguard your organisation.

  • Email support
    Support for Exchange Online, mail flow, spam filtering, and user-level email issues.

  • Handling updates and patches
    Keeping your Microsoft 365 apps secure and up to date through proactive maintenance.

  • Payments and billing
    Licence management, usage tracking, and cost optimisation to keep you compliant and in control.

  • User training and ongoing support
    Onboarding, training, and day-to-day support so your team gets the most from Microsoft 365.

Everything is included as part of our managed service—no surprises, no hidden extras. You get a long-term IT partner keeping your Microsoft 365 environment running smoothly, securely, and aligned with best practice.

Yes. We handle full migrations, including email, files, and user permissions, with minimal disruption.

No problem — many of our clients come to us with Microsoft 365 already in place but not working as it should.

As part of our onboarding, we carry out a full Technology Assessment, which includes an in-depth audit of your current setup. This assessment reviews everything from how your Microsoft 365 tenancy is configured to how tools like SharePoint and OneDrive are being used across your business.

We focus heavily on:

  • Tenancy-level security – reviewing access controls, MFA enforcement, conditional access policies, and overall identity protection

  • SharePoint setup – ensuring sites, libraries, and sharing permissions are aligned to best practices for collaboration and data security

  • Licensing, compliance, and user roles – identifying misalignments or cost inefficiencies

  • Data governance and usage policies – making sure your environment supports secure and efficient work

We’ll then address any configuration issues, implement security improvements, and provide proactive, ongoing support to ensure your Microsoft 365 environment remains secure, compliant, and fit for purpose.

Absolutely. We offer practical training so your staff can confidently use tools like Teams, SharePoint, and Outlook.

Yes. Sereno supports SMEs across London with fast, reliable IT help tailored to local businesses.

Any questions?

Question not answered yet? Whether it’s about our pricing, services or processes. We’re here to answer any question you might have.

Just drop us a line or book your 1-1 discovery call to connect at your preferred time.

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