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Unable to remove default domain email address added to shared mailbox / user mailbox as alias / Unable to delete email alias

some of the reasons microsoft doesn't allows us to remove the alias email address with the default domain.

i created a shared mailbox called when i created that it automatically created an email alias as by default. Now i tried to create an additional shared mailbox but cannot do so as the address is used by

When i try to delete the alias from the first mailbox the settings seems to be saved without any error message, but when i reopen the dialog box the alias address still there. when i try to edit the alias from a new alias is created but the original one stays there.

i contacted Microsoft support but no luck. (SR: 616031993661261)

i suggest Microsoft to look into this issue with high priority. i suggest to create random email alias if the email address exist so that you can solve this issue.

Hope to see the changes soon.

Please refer below URL's everyone facing this issue

Thanks and Regards
Mohan Reddy

134 votes
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