Overview
In Microsoft 365 GCC and GCC High environments, mobile add-ins are disabled by default. Even if they are deployed through the Microsoft 365 Integrated Apps portal, these add-ins will not load on a mobile device.
On Android, the Add-ins menu option is missing from the app's settings. On iOS, attempting to access add-ins displays the message: "This account does not support Add-ins."
To enable Outlook mobile add-ins, your organization will need to update the Microsoft 365 tenant configuration using Exchange Online PowerShell.
Tenant configuration considerations
Review this section before running the cmdlet. Setting OutlookMobileGCCRestrictionsEnabled to $false is an all-or-nothing toggle. In addition to enabling mobile add-ins, it also unlocks several features that Microsoft places outside the FedRAMP boundary for GCC tenants. Your security or compliance team should evaluate whether enabling this setting is appropriate for your organization before proceeding.
Note: Opensense is compatible with GCC and GCC High environments. The considerations in this section relate to Microsoft's tenant-level restrictions, not to Opensense's product.
What this setting unlocks
When OutlookMobileGCCRestrictionsEnabled is set to $false, the following features are enabled alongside mobile add-ins:
Multi-account support (personal or non-GCC accounts on the same device)
Non-Microsoft third-party services
In-app support and diagnostic data submission (HelpShift)
Microsoft services outside the GCC boundary (for example, Bing and Cortana)
Third-party calendar apps (Facebook, Wunderlist, Evernote, Meetup)
Third-party storage providers
Office Lens (camera and scanning features)
Expanded file picker beyond email attachments
Enabling mobile add-ins: Microsoft's official instructions
Once your security or compliance team has reviewed the considerations above and determined that enabling mobile add-ins is appropriate for your organization, follow Microsoft's official documentation to run the Exchange Online PowerShell cmdlet.
Microsoft's article covers the exact command, how to revert the change, and expected propagation time.
Opensense does not provide direct support for Exchange Online PowerShell configuration. For questions about running the cmdlet or its impact on your tenant, contact Microsoft support or your IT administrator.
Using Outlook for iOS and Android in the Government Community Cloud (Microsoft Learn)