Anonymous
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3,725 votes
Azure Active Directory Conditional Access has functionality for “Countries/Regions” – see https://docs.microsoft.com/en-us/azure/active-directory/conditional-access/location-condition
That said, the most effective protection you can have against password spray attacks is to enable MFA and disable basic authentication. If you cannot do this for your entire organization, then blocking user access to legacy protocols like POP, EWS, IMAP and SMTP is another step you can take. Exchange Online Client Access Rules can help you to further customize (https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/client-access-rules/client-access-rules). For additional recommendations, please see Office 365 Secure Score.
That said, please know that we are listening to feedback and working on solutions to help make Office 365 users more secure. Thank you for the feedback.
An error occurred while saving the comment Anonymous
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The disclaimer approach is poor at best. The end user composing the email never gets to set unless they receive a reply, it is always appended to the end of the entire message thread, not the most recent message. Why not add a place in exchange to store the signature block (both an HTML version and a plain text version). Add the appropriate controls so the admin can either allow the end user to do their own thing, OR, flip the switch (either on the mailbox itself, or the entire domain) and the end user can no longer update the signature, but it is ALWAYS sent, and appears in the proper place. Switches envisioned:
-UserCanEdit (true or false)
-HTMLSignature ",,,,,," (the html....)
-TextSignature "....." (the textual version, complete with line breaks)
-ReplyUseSignature (true or false - inserts the appropriate signature for replies to messages, or not)
-ForwardUseSignature (true or false - inserts the appropriate signature for forwarding of messages, or not)
-ShowSignatureInEditor (true or false - places a copy of the configured signature into the message at the appropriate location, and allows the end user to manipulate that copy).
-SignatureOnMobile (true or false - inserts the signature when emailing on a mobile/smart device)
-SignatureOnOutlookClient (true or false - overides what is configured in the Microsoft Outlook Desktop application for signatures)
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1 voteAnonymous
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We have bad actors that make multiple attempts daily to break into our tenant. We need the ability to restrict logins/connection to USA locations only!