User's properties could not be updated after invitation Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.

Question

User's properties could not be updated after invitation Invitations are blocked for this directory due to suspicious activity. Please contact Microsoft support for help.

Mark Loria 5

Im new in microsoft teams, i have successfully added some guest accounts but when i add new guest account im getting error

Adding User Problem

Rukmini 43,915 Reputation points Microsoft External Staff Moderator

2026-04-10T03:46:21.9033333+00:00

Hello Mark Loria

As part of its security enhancements, Microsoft has anomaly detection systems in place to identify unusual activity, such as an unusually high number of invitations being sent from a tenant. If such anomalies are detected, the tenant may be temporarily blocked.

To unblock your tenant, please provide a business justification explaining the need for bulk invitations along with below details via private message only (do not post publicly):

1 answer

Your answer

Rukmini 43,915 Reputation points Microsoft External Staff Moderator

2026-04-10T03:46:21.9033333+00:00

Hello Mark Loria

As part of its security enhancements, Microsoft has anomaly detection systems in place to identify unusual activity, such as an unusually high number of invitations being sent from a tenant. If such anomalies are detected, the tenant may be temporarily blocked.

To unblock your tenant, please provide a business justification explaining the need for bulk invitations along with below details via private message only (do not post publicly):

Answer 1

The error indicates that Microsoft has blocked external invitations for the tenant due to suspicious activity. This block is enforced at the directory (Microsoft Entra ID) level and cannot be removed by configuration changes in Teams or Entra ID.

To resolve it, a tenant administrator must contact Microsoft Support and request that the directory be reviewed and the invitation block removed. Until Microsoft Support clears the block, new guest invitations (for Teams, SharePoint, or any B2B collaboration) will continue to fail with this message.

After the block is lifted, guest invitations will again create B2B guest users in the directory as normal.

References: