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Microsoft 365 (Outlook on the web) - Error - The sharing invitation couldn't be sent/deleted

When you attempt to manage the permissions of another account's (User/NetID, Service Account, or Resource) calendar, you receive one of the following errors:
  • Adding/Sharing a new user

    share_add_error.png

  • Removing/Deleting an existing user

    share_delete_error.png

Important: Even though you received this error, the action (adding or removing permissions) you performed was completed successfully. It's only that the user you added/deleted did not receive an email notifying them of this change.

Reason for error

This action requires that you have the ability to either 'send as' or 'send on behalf of' the account. At this time, you only have full mailbox permissions to this account.

Fix this error

If you want users to receive the email notification automatically, grant the account that is managing these permissions 'delegate' rights to the calendar of the account. Note: If you are granting these permissions to a service account, it must be viewable in the Global Address List). Delegate rights provide the user with 'editor' and 'send on behalf of' rights.


Keywords:
microsoft ms office365 o365 m365 microsoft 365 permissions share sharing assign grant remove user netid service account resource calendar room vacation project equipment granting assigning removing editor fullmailbox  
Doc ID:
70897
Owned by:
O365 S. in Microsoft 365
Created:
2017-02-22
Updated:
2023-02-02
Sites:
DoIT Help Desk, Microsoft 365