My outlook account notices some unusual IMAP Login from Microsoft at Redmond

Anonymous

I'm noticed from Microsoft Account Service that my outlook account has been exposed some IMAP Logins from each of the IPv4 addresses at 13.101.0.0-13.101.255.255 since 2022-07-11 JST informed as "unusual activity".

And I found with using whois service that these IP may be managed by Microsoft and placed at Redmond city in US.

Yeah I changed PW in usual way but these access can't stop anyway, so I'm guessing this is a specification for Outlook service.

But at the same time I am afraid of some attacks to Outlook service or Microsoft's collection of users data.

Does Anyone know some information about these kinds of access?

I already used technical help service of online chats in Japan, but he said that he doesn't have some clear idea.

Notification

Thanks to any users to read this thread and report the same issue.

I guess you all are as anxious as I am, but I'd like you to just keep focus on the topic of "unusual activity" from 13.101.0.0/16 here.

While many attacks on login to some system will happen all the time around the world, Thus this case is unique in that it's coming from IPv4 addresses inside Microsoft.

And here we hope to solve this strange problem.

Thank you for your cooperation.

S.E.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

Anonymous

User @Chezlong Just placed this on my forum post

https://answers.microsoft.com/en-us/outlook_com/forum/all/unusual-account-activity-from-ms-ip-addresses/974cc1c1-232f-44a2-b0eb-0f378fd2c801?page=5:

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

AND

Found the following on thread https://answers.microsoft.com/en-us/outlook\_com/forum/all/outlook-mail-account-unusual-activity/6cfb226f-8cd7-41ae-bd0a-a80d100af543?page=9

posted by user @Pierre-LucMorais:

I have looked for other means to communicate to MS and I found an “official” thread to post this problem. Your mile may vary but i’ve had a reply on my thread and encourage ppl to try using them as well ?

https://www.reddit.com/r/microsoft/comments/o22lfc/microsoft\_official\_support\_thread/

They’ve responded that it is a backend accessing the service and a known issue.

Hoping this helps

0 comments

Answer accepted by question author

Anonymous

Outlook email users alerted to suspicious activity from Microsoft-owned IP address—
People turn amateur sleuths to discover that the source of all those sign-ins seems to be in Redmond
https://www.theregister.com/2022/07/21/outlook_sign_ins/
Article has an update at the end:

Updated at 09.33 UTC on 22 July 2022 to add:
Following publication of this article, Microsoft sent us a statement:
"We're working to resolve a configuration issue causing some customers to receive these notifications in error," said a Microsoft spokesperson via email.

0 comments

56 additional answers

Anonymous

2022-07-12T21:56:26+00:00
Hi Soluna Eureka , Thank you for posting to the Microsoft community. Based on the description, you are having an issue on your account notices some unusual IMAP Login from Microsoft at Redmond. This usually happens when there's a user trying to access on your account using your Azure account or device. Let's check this out together and find ways to solve this. Before anything else, let me ask you the following questions below so that I fully understand the problem.
1. When does the issue started?
2. What are the steps have you done so far?
We are truly grateful that you have taken the time to convey this concern to us. I would suggest to update your password, enable 2 factor to make sure you are protected.

We look forward to your response. If you have other clarifications on this question, you can get back to us by replying to this post.Truly Yours,FatimaMicrosoft Moderator
Was this answer helpful?

1 person found this answer helpful.

0 comments No comments

Anonymous

1st unusual Login

2022/07/10 15:13 JST

13.101.108.40

Change Pass phrase

**2022/07/11 00:41 JST**

**with Really Long and Random Word**

2nd unusual Login

2022/07/11 03:14 JST

13.101.108.40

3rd unusual Login

2022/07/11 05:19 JST

13.101.186.24

4th unusual Login

2022/07/11 05:19 JST

13.101.109.109

5th unusual Login

2022/07/11 05:37 JST

13.101.186.234

6th unusual Login

2022/07/11 05:37 JST

13.101.109.109

7th unusual Login

2022/07/11 09:17 JST

13.101.108.202

8th unusual Login

2022/07/11 09:17 JST

13.101.186.234

9th unusual Login

2022/07/11 09:17 JST

13.101.109.109

10th unusual Login

2022/07/12 06:41 JST

13.101.108.40

11th unusual Login

2022/07/12 07:06 JST

13.101.109.109

12th unusual Login

2022/07/12 08:34 JST

13.101.196.236

13th unusual Login

2022/07/12 08:49 JST

13.101.109.41

14th unusual Login

2022/07/12 08:49 JST

13.101.108.40

15th unusual Login

2022/07/12 09:24 JST

13.101.108.40

16th unusual Login

2022/07/12 10:36 JST

13.101.108.202

17th unusual Login

2022/07/12 10:43 JST

13.101.196.236

18th unusual Login

2022/07/12 12:00 JST

13.101.196.236

0 comments

Anonymous

2022-07-13T11:13:55+00:00

I connect to my Outlook account from only macOS with default mail client

And really I'm not sure about using Azure account or Azure Device.

I just heard about it from my roommate that he had same problem.

OK, now I try to use 2 factor authentication, and I recommend him the same way.
Was this answer helpful?

1 person found this answer helpful.

0 comments No comments