Error When Attempting to Add a Secondary Email Address to a User

Hello,

Our exchange server is hosted through Office 365.

I was attempting to add an "other email address" to one of our users (we'll call him "User 1") when I encountered the following error:

The proxy address "smtp:sales@[domain].com" is already being used by the proxy addresses or LegacyExchangeDN of "[User 2]". Please choose another proxy address. (The "MailUniversalDistributionGroup" with display name "[User 2]" is already setup and using the same address.)

"User 2" doesn't exist anymore though... Or rather, that user doesn't appear in my list of "Active Users" on my Office 365 Admin dashboard.

So... how do I overcome this issue?


March 26th, 2015 5:27pm

as you said User2 does not exists anymore, it will take some time to be updated after that users2 was deleted. I'd say wait some time or ask O365 how long does it take. I can take upto 30 min to couple of hours depending on the AD replication in O365
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March 26th, 2015 5:36pm

User 2 hasn't existed for months now.

I actually figured it out tho.  Apparently there was an old group forwarding rule I had missed.

Got it working now. :)

March 26th, 2015 5:39pm

glad to know that
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March 26th, 2015 5:50pm

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