Microsoft 365 Groups: Your Collaboration Partner

The Problem Groups Are Designed to Solve

Before Microsoft 365 Groups, collaboration in Office environments was fragmented. A project team might have a shared folder on the file server, a distribution list for email, a Skype group chat, and a calendar shared through Outlook — all separate, all requiring separate access management, and none of them connected to each other.

Microsoft 365 Groups address this directly. When you create a Group, you get a shared mailbox and calendar, a SharePoint document library, a Planner board for task management, and — if needed — a Teams workspace. One membership list controls access to all of them. When someone joins the team, you add them to the Group once. When they leave, you remove them once.

This is the practical value of Groups: they turn disconnected tools into a coherent workspace, managed through a single access control point.

Groups in Practice: How Businesses Actually Use Them

Project Teams

A project team benefits from a Group that includes the project's shared mailbox (for client communications copied to the whole team), a SharePoint document library (for project files, proposals, deliverables), a Planner board (for task tracking), and a Teams channel (for day-to-day communication). All of this is connected through one Group, and all members have access to all components.

When the project ends, the Group can be archived rather than deleted — preserving the history of the project's communication and documents while removing it from active use.

Departments

Departmental Groups — HR, Finance, Marketing — give each team a shared inbox for their department address, a document library for internal policies and documents, and a Teams workspace for their daily communication. This replaces the mix of distribution lists, shared drives and email threads that most departments rely on.

Cross-Functional Working Groups

Groups work well for temporary cross-functional teams — a product launch team that includes members from sales, marketing and operations, for example. Members from different departments can be added to the Group without joining each other's departmental Teams. The working group has its own space without creating noise in the parent department structures.

Shared Mailboxes vs Group Mailboxes

Microsoft 365 offers two similar but distinct options for shared email: traditional Shared Mailboxes and Group mailboxes. Understanding the difference helps businesses choose the right approach:

Shared Mailboxes (e.g. info@company.co.uk, accounts@company.co.uk) are accessed from each user's own Outlook profile — they appear as an additional mailbox. They don't require a separate licence (up to 50GB). They're appropriate for simple inbound email routing where multiple people need to see and respond to emails.

Group mailboxes (part of a Microsoft 365 Group) have a subscription model — members subscribe to the shared conversation rather than having it appear in their own mailbox. Group email is designed for collaboration rather than simple routing, and works best when the team wants a shared discussion thread rather than a single inbox to manage.

For most info@ and accounts@ addresses, a traditional Shared Mailbox is cleaner. For project teams or departments that want a shared conversation space alongside their other collaboration tools, a Group mailbox is more appropriate.

Groups and External Collaboration

Guest users (external collaborators) can be added to Microsoft 365 Groups, giving them access to the Group's SharePoint site, Planner and Teams. This is a practical way to bring clients, partners or contractors into a shared project workspace without giving them access to your broader environment.

Guest access is controlled by your IT administrator's tenant settings and can be enabled or disabled per Group. Best practice is to enable guest access only where genuinely needed, and to regularly review who has guest access to active Groups.

Managing Groups as an Administrator

The Microsoft 365 Admin Centre provides a Groups section where administrators can view all Groups, manage membership, configure settings and monitor for inactive Groups. Azure Active Directory provides more granular management — including access reviews and conditional access policies tied to Group membership.

Key administrative tasks for Groups include:

• Setting expiry policies to flag Groups that haven't been active for a defined period
• Configuring naming policies to enforce consistent naming across the organisation
• Restricting Group creation to prevent uncontrolled sprawl
• Reviewing guest membership periodically

AMVIA manages Microsoft 365 Groups and governance policies for UK businesses — ensuring the environment stays organised, secure and auditable as organisations grow and change.