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Grant Mailbox Permission in Bulk gives several people the same access to one mailbox in one run: full access to open it, or the right to send as or on behalf of it. Use it when a team needs to work from one mailbox, for example to cover a colleague’s leave. Mailbox Delegation works the other way round: it gives one person access to one or more mailboxes. Grant Mailbox Permission in Bulk needs Microsoft 365 connected, with Exchange access for the client.

Grant Mailbox Permission in Bulk in 50 seconds: what it asks, what it does and what you get.

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What the form asks

There’s no auto-map question: full access is always granted with auto-mapping on.

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What it does

  1. Creates a ticket in your PSA, if Ticketing is on.
  2. Waits for approval, if Approval is Internal or External, or a conditional override matches.
  3. Grant Mailbox Access: in the client’s Exchange Online, gives each person in turn the access you chose:
    • Full access lets them open the mailbox, and auto-mapping adds it to their Outlook.
    • Send as lets them send mail that appears to come from the mailbox.
    • Send on behalf lets them send mail that shows it was sent on the owner’s behalf.
It’s one run for everyone. Executions lists it as Core · Bulk Mailbox Permission · the client’s name. With Log actions to the ticket on, the ticket also gets a note when the run starts, after Grant Mailbox Access and when the run completes. Each run grants one access level. To give people full access and Send as, run it once for each. See Microsoft’s Manage permissions for recipients.

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Configure it

Go to Config, choose Mailboxes and click Grant Mailbox Permission in Bulk.

Configure Grant Mailbox Permission in Bulk: every option, step by step (1:29).

Approval, Ticketing and User directory filters are set on Base config and apply to every client unless you override them for one. For how Base config and client overrides work, see How configuration works.

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Troubleshooting

Check User directory filters. Shared mailboxes usually have no licence and leavers’ sign-in is blocked, so for that client override the filters and untick Licensed users only and Active users only.
The client has no Exchange connection in Triggr yet. See Exchange Online.
Open the run in Executions to see the error. People are granted in the order you added them, so anyone before the failure may already have access.