Interesting auth attempts with unusual user agent string

["Jim A. Bole" <jbole () STEVENSON EDU>]

I'm seeing a spike in some interesting auth failures to O365 with the user agent string 
"Outlook-iOS/723.4027091.prod.iphone (4.28.0)"

These attempts are similar to the now steady stream of IMAP4 failures.

Anyone have any info on this, especially the user agent string. It appears to be a developer API.

This activity started Friday and is ongoing.

Thanks.

Jim Bole
Director of Information Security
Stevenson University
1525 Greenspring Valley Road
Stevenson, MD, 21153-0641
jbole () stevenson edu | O: 443-334-2696



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