“Cannot Protect a Group Mailbox Because the Group Doesn’t Have an Owner” in Veeam for Microsoft 365
When protecting Microsoft 365 data with Veeam Backup for Microsoft 365, you may encounter the following error while attempting to back up a Microsoft 365 Group mailbox: Error: Cannot protect a group mailbox because the group doesn’t have an owner. This issue typically appears during a job session that includes Microsoft 365 Groups, and it prevents Veeam from processing the group mailbox successfully. How to Resolve To resolve the issue, simply assign at least one owner to the affected group: 1. Sign in to the Microsoft 365 portal with an account that has administrator privileges. Choose Teams & Groups from the navigation pane on the left, and then Active Teams & Groups from the drop-down menu. 2. Find the group that you need to assign a new owner to and click on it. 3. Under Membership tab, choose Owners and click Add Owners. 4. Search or select desired owner(s) and click Add. Once ownership is properly assigned, Veeam will be able to back up the group mailbox successfully. For additional information or assistance please contact support@managecast.com.