How to check where employees or users are trying to log in from over OWA for Exchange Online

I'd like to know how I can check where my employees or users are logging onto their OWA for Exchange Online.

1. I'd like to know their Client IP Addresses.

2. I'd like to know the session details of their accounts.
- The same account from office desktop (session details with IP Address)
- The same account from home laptop (session details with IP Address)

Please pointer.

Will
williamwlkAsked:
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Peter HutchisonSenior Network Systems SpecialistCommented:
OWA uses IIS and access can be logged in Windows. Logs are store in C:\Inetpub\Logs\W3SVC1. Copy a log to you local machine and open it in Excel. The column you need is c-ip (client ip).
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Vasil Michev (MVP)Commented:
Not possible with Exchange Online. If you want to restrict access to/from certain IPs, you need to go with AD FS or with the Azure MFA solution (I believe it now supports IP whitelists too).
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williamwlkAuthor Commented:
So exhausted googling and reading and researching and all that for the past few days.

One Exchange Online Mailbox was compromised and I wanted to find out at least where the unknown access is coming from.

Anything else I could or should do with that?

Ack'ed for ADFS, Vasil.

Peter, my case is Exchange Online (hosted with Microsoft).

Cheers.
Will
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Vasil Michev (MVP)Commented:
Raise a case with Microsoft, nothing else you can do.
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williamwlkAuthor Commented:
OK, Vasil, Don't mind me asking a very stupid question.

Where should I raise a case with Microsoft? I don't seem to be able to locate a place where I can talk to people or hear my troubles.

Cheers.
Will
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Peter HutchisonSenior Network Systems SpecialistCommented:
You need to login to your office 365 or MSOnline portal and select Support, Service Requests to generate a support request. Usually a technician will call you about your query.
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williamwlkAuthor Commented:
Thanks, Guys! I have tried to reach MS Online Support. Cheers.
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