Exchange 2013 - additional mailboxes or use automapping

User A is logged is as themselves. Want to use shared Mailbox PA-B as they're main mailbox (the user is PA to the chief exec and this a special pa chief exec mailbox). User also has access to other mailboxes (inc the chief execs actual mailbox call it CA-C).

Mostly User A wants to SEND AS the user PA-B, but sometimes they want to SEND AS the chief exec CA-C. Same with calendar requests.

As per my other questions, seem the best idea it to let the user have a profile with PA-B as the mailbox and then add the others in. Question is though add them as additional mailboxes or let automapping find them? Int he past this has caused us problems with duplicates.

I assume autodiscover looks at the logged in user (i.e user A in this case) and adds mailboxes that this user has access to? Is this how it works?
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paulfoelAsked:
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
Add manually. But not as extra mailboxes. Add them as additional Exchange accounts to your Outlook profile instead.
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Alan CoxSr. Systems Engineer | Lead Microsoft CIE Qualified FacilitatorCommented:
I generally let automap add the mailbox to outlook unless I have an admin that has access to a lot of mailboxes and may not want 50 mailboxes show up in outlook. Yes, autodiscover is how this works. You can see this by holding control key and right clicking outlook icon in system tray by clock, choose test autoconfiguration.
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
I strongly recommend to add any Exchange mailboxes as a separate Exchange accounts to Outlook and stop using additional mailboxes (retained mostly for backwards compatibility and cause many troubles).
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Alan CoxSr. Systems Engineer | Lead Microsoft CIE Qualified FacilitatorCommented:
I agree with Alexei that you normally shouldn't add additional mailbox but add separate account. Then you can send from that account as well provided send as is set.
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paulfoelAuthor Commented:
So bit confused? Add manually as extra mailboxes or let automap do it?

Ive noticed if you add manually then automap adds as well and you get LOTS of mailboxes.
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