Microsoft 365 Support Services in London

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.

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.