Mange send as permission

Hi there
Mailbox123 My own
Mailbox2 my second mailbox
It works fine to send Emails, but when I send an Email from Mailbox2,
It goes to sendmails in mailbox123
It is supposed to go in sendmail in mailbox2
How do I fix this?

Hi Lenette,
Thank you for your question.
Did Mailbox123 and Mailbox2 belong to same organization?
Was Mailbox123 and Mailbox2 configured in outlook on the same client?
If that, we could rebuild the profile and restart the service of “Microsoft Exchange Information Store” on Exchange to check if the issue persist.
Which mailbox was granted “send as” permission?
Did the issue occur by OWA?
If there are any questions regarding this issue, please be free to let me know. 
Best Regard,
Jim
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
Jim Xu
TechNet Community Support

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