troubleshooting Question

O365 External contacts contain domain email address in "other emails" how to fix?

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iamuser asked on
ExchangeMicrosoft 365Contact Management
2 Comments1 Solution228 ViewsLast Modified:
we are in a hybrid O365 and on premise exchange exchange (2016). And i am seeing that all external contacts that we add end up with additional "other email addresses" besides the correct (external primary address). The other addresses end with our domain.

Ex. Josmith@abccompany.com will be shown as the primary email - external contact

in the email options however I will see something like this, josmith@mycompany.com and abccompany@mycompany.mail.onmicrosoft.com

The problem now is that if i need to add an internal user that's named josmith@mycompany.com it does not work. It will tell me that josmith@mycompany is already in use.

how do I fix this problem? I can't delete the external contact.
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