| Event Id | 7040 |
| Source | MSExchangeMig |
| Description | One or more characters specified for Common-Name are not valid. The name was changed from <name> to <name>. |
| Event Information | The Common-Name attribute is the directory name of the mailbox in Active Directory. This field defaults to the mailbox name with extended characters removed. You cannot change this name without deleting the mailbox and recreating it. No user action is required. |
| Reference Links |
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