# ExchangeOnlineMailboxPermissionMustHaveRegex

A regular expression to filter mailbox-level permissions.

Mailbox-level permissions are included in ACLs only when the user principal matches the regular expression.

Type: | String (regular expression)
Default: |
Required: | No
Configuration Section: | TaskName or FetchTasks
Example: | `ExchangeOnlineMailboxPermissionMustHaveRegex=user@domain\.com`
See Also: | ExchangeOnlineMailboxPermissionCantHaveRegex ExchangeOnlineMailboxPermissions

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