550 5.7.501 Access denied, spam abuse detected - Microsoft Community

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hello, developer managing service related outlook calendar.

our server call many calendar apis of office365 accounts users connected includes creating event attendees.

however, our test accounts type business office365(address ends "onmicrosoft.com") cannot send invitation email.

a part of received message '550 5.7.501 access denied, spam abuse detected'.

according article(https://techcommunity.microsoft.com/t5/outlook/remote-server-returned-550-5-7-501-access-denied-spam-abuse/td-p/15097), suspect our server ips originating ip of invitation emails blocked.

could please check if let know our ips or application id?

thanks.

hi fhub2,
 
issue has been fixed. can check @ convenience? if have questions it, can directly contact or reply sr emails. 

time.
 
best regards,
erick


Office / Outlook / Other/unknown / Office 365 for business



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