Unusual Account Activity from MS IP Addresses

Anonymous
2022-07-15T04:15:50+00:00

Yesterday I received an email from your Microsoft Account Team regarding unusual activity.  When I looked into it, it showed an unusual actvity detected for an Automatic POP3 sync from IP 13.101.248.75.  This activity did not have my account alias listed as it usually does, and listed the location as United States.  On the review activity page I said this was not me.  I changed my password, but then saw another unusual account activity from IP 13.101.248.41. This one did have my account alias listed.   I changed my passwords almost 1/2 dozen times yesterday.24hrs after my final password change, I received today another email regarding unusual activity.  It was another unusual activity detected for an Automatic POP3 sync from IP 13.101.248.75. Once again I confirmed this was not me, although this time I did not change my password.  Three hours later, I received yet another notification of unusual activity.  This time it was for IP 13.101.219.207  However, at the same time it had the exact same thing for IP address 13.101.53.212.  While I was not notified of that one, nor asked to confirm if this was me, it does list it as unusual activity. I looked all the IP address up on ARIN WHOIS.  According to them they all belong to Microsoft. I am sending this to all the email addresses on ARIN WHOIS that are listed as a point of contact.  I NEED ANSWERS. This has never happened before yesterday. I am afraid to confirm that these are me because I don't understand why MS IPs would be POP3 syncing to my account. I only have my Gmail account to POP3 sync to this email.  Those IP addresses tend to begin with a 2607 number.  I keep saying this isn't me, but not sure what I should do. Ignore, confirm it's me or continue to say it's not me. I want to know why is a Microsoft IP auto syncing to my email account? So much so that it generates an unusual activity text/email?I NEED some guidance on this.  There is no help article covering this.  And there is no way to contact a live person for help, which is ABSOLUTELY RIDICULOUS!

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Anonymous
2022-07-19T21:48:24+00:00

Finally got to talk to someone at MS- this was their reply:

Thank you for the information. Please be advise that Microsoft is aware of this known issue already. This started to happen even last week and we are already working with this matter. We even have created a ticket number for this issue while it is still happening.

The ticket number for the emerging issue is INC31680156.

So they are on it, but no idea when it will be fixed.

[EDIT] They also confirmed that the account was secure, no need to change passwords, etc

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  1. Anonymous
    2022-07-18T22:11:39+00:00

    Hi Jennifer,

    Thank you for posting this as I thought my systems were under attack!

    The exact same warning regarding Unusual Activity Detected is happening to me from IP 13.101.248.75 and 13.101.248.41, both related to MS and an IMAP email protocol automatic synch.

    This started last week on 2022-07-13, tracked my activity from my Microsoft account within Excel, that is the first occurance of 13.101.248.75.

    Thought it was related to the 2022-06 Cumulative Update for Windows 10 Version 21H1 for x64-based Systems (KB5014699) installed on my computer on 2022-07-14 but it apparently is not.

    I changed my password over a dozen times, within hours another unusual sign-in activity message on my Microsoft account.

    When checking my activity through Microsoft the session type: Automatic Synch, Protocol: IMAP, Account Alias: my Microsoft Account email address, Approximate Location: United States, Type: Unusual Activity Detected

    Any help to stop this behaviour is greatly appreciated.

    Best regards,

    Toni Catchpaw

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  2. Anonymous
    2022-07-18T19:36:52+00:00

    Me too, IMAP synchs. I use Thunderbird

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  3. Anonymous
    2022-07-18T18:37:49+00:00

    In the UK having the same issues as described

    2 minutes ago
    Automatic Sync
    United States
    ProtocolPOP3
    IP: 13.101.225.23
    Account alias:

    Time2 minutes ago
    Approximate location: United States
    Type: Unusual activity detected
    [Automatic syncing device icon]
    14/07/2022 15:28
    Automatic Sync
    United States
    ProtocolPOP3
    IP: 13.101.236.113
    Account alias:

    Time14/07/2022 15:28
    Approximate location: United States
    Type: Unusual activity detected
    [Automatic syncing device icon]
    13/07/2022 10:25
    Automatic Sync
    United States
    ProtocolPOP3
    IP: 13.101.241.5
    Account alias:

    Time13/07/2022 10:25
    Approximate location: United States
    Type: Unusual activity detected

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  4. Anonymous
    2022-07-18T15:12:30+00:00

    The same problem started to me recently as well, although I did not travel or use new devices. The IP address has been something like 13.101.86.* which seems to be within the Microsoft Domain. The unusual activity was caused by Automatic Sync using IMAP protocol. I suspect the issue has to do with my email accounts used in iPad or iPhone where some settings were changed recently after my iPhone Mail App stopped receiving updates of messages.

    I changed to use one of my Apple devices to be linked to my Gmail account, the other to Hotmail. So, my problem initially started with no update of my email messages after the change.

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