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External B2B collaboration users are prompted to login with #EXT# accounts when opening shared documents

Issue Summary When external users—already provisioned as External Members in our tenant through an MTO sync—attempt to access shared documents from another Microsoft 365 tenant (that is part of the MTO), they are prompted to sign in using a #EXT#…

Microsoft 365 and Office | SharePoint | For business | Windows
asked 2025-10-23T20:27:18.7033333+00:00
Cory Spence 0 Reputation points
commented 2026-02-26T14:21:59.7666667+00:00
Mark Bewley 71 Reputation points
1 answer

Spam Emails Delivered to Inbox & Repeated Unauthorized Sign-in Attempts from Foreign Locations (Microsoft 365)

Hello Team, We are currently facing two major security concerns in our Microsoft 365 tenant. 1️⃣ Spam Filtering Issue Multiple spam emails are being delivered directly to employee inboxes. Some legitimate business emails are being marked as…

Microsoft 365 and Office | Microsoft 365 Defender | Other | Windows
asked 2026-02-26T14:21:16.71+00:00
Sorin Advisors LLP 0 Reputation points
answered 2026-02-26T14:21:43.92+00:00

AI answer

2 answers

How to fix error code 500121

How do I fix error code 500121. My Authenticator app isn’t giving me a verification code Moved from: Microsoft 365 and Office | Access | For education | Windows

Microsoft Security | Microsoft Authenticator
asked 2026-02-25T09:34:28.3233333+00:00
Yates, Sierra 5 Reputation points
edited an answer 2026-02-26T14:19:32.5366667+00:00
Liora D 15,290 Reputation points Microsoft External Staff Moderator
1 answer

Windows Security Prompt for Outlook

In a hybrid setting, when switching from ethernet to Wi-Fi at work, is it possible that the user that has their user profile on prem will be prompted by windows security to enter their credentials to authenticate from outlook? This prompt also pops up…

Outlook | Windows | Classic Outlook for Windows | For business
asked 2026-02-19T06:03:42.8533333+00:00
Spoorthy Manjunatha 0 Reputation points
commented 2026-02-26T14:17:14.9133333+00:00
Jack-Bu 6,770 Reputation points Microsoft External Staff Moderator
2 answers

Focus on content for Teams on the minimised window

When minimsiign the teams window to the bottom right on the screen, it focuses on the current speaker. How can you change this to focus on cotnent, and not the speakers?

Microsoft Teams | Microsoft Teams for business | Meetings and calls | Audio and video
asked 2026-02-26T10:01:20.18+00:00
D 0 Reputation points
answered 2026-02-26T14:15:58.9466667+00:00
Bisharat Khan 0 Reputation points
2 answers One of the answers was accepted by the question author.

NO TEMPLATES

I am trying to print a birthday card but cannot find the templates. I am on windows 10 using word 2010 any advise would be appreciated. Thanks

Microsoft 365 and Office | Word | For home | Windows
asked 2026-02-26T11:23:18.7966667+00:00
P M 20 Reputation points
accepted 2026-02-26T14:15:42.66+00:00
P M 20 Reputation points
3 answers

I want to change the email address registered to my Microsoft account.

使用している組織のアカウント(メールアドレス)のドメインが変更になるため、新しいドメインのをユーザーとして登録を行いたいのですが、「組織に属しているため、組織を離れるとアクセスができなくなる可能性があります。別のメールアドレスを入力してください。」と表示が出てしました。 該当アドレスは個人に貸与されたメールアドレスのため登録を行いたいのですが、どのようにすれば良いのかご教示をお願いします。 Modの移動元: Microsoft System Center | Other

Microsoft 365 and Office | Subscription, account, billing | For business | Other
asked 2026-02-20T01:21:56.43+00:00
山村博之 0 Reputation points
commented 2026-02-26T14:15:23.03+00:00
AlexDN 11,425 Reputation points Microsoft External Staff Moderator
0 answers

Why I cant verify my academic status?

It shows me this,, what to do now? Daffodil International university is no.1 private university in bangladesh,

Community Center | Not monitored
asked 2026-02-26T05:56:29.6866667+00:00
Md Foysal Ahmed 0 Reputation points
edited the question 2026-02-26T14:15:03.9166667+00:00
Siva shunmugam Nadessin 10,810 Reputation points Microsoft External Staff Moderator
2 answers

Region Workplace

When creating a new workplace in Azure ML, the region always isn't allowed. I tried every region and none fits my geographical location. How can i fix that?

Azure Machine Learning
Azure Machine Learning

An Azure machine learning service for building and deploying models.

3,653 questions
asked 2026-02-24T14:10:42.8033333+00:00
Flavio Mezuri 0 Reputation points
answered 2026-02-26T14:14:30.6333333+00:00
Anshika Varshney 11,310 Reputation points Microsoft External Staff Moderator
1 answer

I don't see my device (signed in with microsoft account) in my account my devices list. Anyone can help me with this issue please?

I don't see my device (signed in with microsoft account) in my account my devices list. Anyone can help me with this issue please?

Windows for home | Windows 11 | Accounts, profiles, and login
asked 2026-02-26T13:41:32.3066667+00:00
Mohammad Ameen 0 Reputation points
answered 2026-02-26T14:14:19.6166667+00:00
DaveM121 878.9K Reputation points Independent Advisor
1 answer

Windows not seeing audio devices

I switched to headphones yesterday and then all my sound output disappeared

Windows for home | Other | Devices and drivers
asked 2026-02-26T11:54:35.0366667+00:00
Shawn 0 Reputation points
answered 2026-02-26T14:14:04.3966667+00:00
David-M 112.6K Reputation points Independent Advisor
1 answer

Post master emails and delayed ones

We are currently having problems recieving emails from certain individuals and they get sent the below message and also now returning emails a post master message PLease help This is an automatically generated Delivery Status Notification. THIS IS A…

Outlook | Windows | New Outlook for Windows | For home
asked 2026-02-26T09:40:58.6933333+00:00
Ferry Road Nursery 0 Reputation points
answered 2026-02-26T14:13:09.65+00:00
EmilyS726 232.3K Reputation points Independent Advisor
2 answers

my outlook is working very slow

the outlook is ruining very slow. it takes a lot of time to open any thing in the outbook.

Exchange | Other
Exchange | Other

A powerful email and collaboration platform developed by Microsoft, designed to support enterprise-level communication and productivity. Miscellaneous topics that do not fit into specific categories.

945 questions
asked 2026-02-25T11:58:13.0133333+00:00
Shvan Bakhtyar 0 Reputation points
commented 2026-02-26T14:10:40.5833333+00:00
Hani-Ng 11,150 Reputation points Microsoft External Staff Moderator
2 answers

How to stop Outlook downloading files to my Mac

Hello, I use Legacy Outlook on my Mac for my work emails. Every few months I have to delete Outlook and all it's files it downloads to my laptop as my system storage is completely full. I have googled how to stop this from happening but all the options…

Outlook | MacOS | Legacy Outlook for Mac | For business
asked 2026-02-25T10:06:11.36+00:00
Clare 0 Reputation points
commented 2026-02-26T14:09:49.18+00:00
Hani-Ng 11,150 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

my hotmail gets blocked since 16 Feb

My hotmail gets blocked since 16 Feb after i tried the wrong password for sign in. I lost the other email to which hotmail sends code. I sent the recovery form on 18 Feb, no reply until 23 Feb. So i sent another recovery form on 23 Feb, still get no…

Outlook | Web | Outlook.com | Account management, security, and privacy
asked 2026-02-25T16:52:00.8333333+00:00
Yanmin Sheng 40 Reputation points
commented 2026-02-26T14:07:55.9933333+00:00
Victor1-V 8,645 Reputation points Microsoft External Staff Moderator
1 answer

recovery key

i wantto retrieve recovery key for my windows 11 with account ******@outlook.com

Windows for home | Windows 11 | Recovery and backup
asked 2026-02-26T11:49:07.1433333+00:00
IBRAHIM MAHAFUZU SAPPOR 0 Reputation points
answered 2026-02-26T14:07:19.0666667+00:00
EmilyS726 232.3K Reputation points Independent Advisor
1 answer One of the answers was accepted by the question author.

PowerApp Query

Hello,  I am building a solution using PowerApps, and I have run into a little problem which I have been unable to find a solution for and Co-pilot is having a hard time understanding. I have a form of which has a Category and Sub-Category option within…

Microsoft 365 and Office | SharePoint | Other | Windows
asked 2026-02-26T11:39:09.4966667+00:00
Kieran Riley 20 Reputation points
commented 2026-02-26T14:07:17.4266667+00:00
Nam-D 3,865 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Cannot enroll my domain to azure domains

Hi, I'm encountering an issue when I try to add my domain to azure and even though I added the TXT records required correctly and managed to enroll other domains - I fail to enroll a specific one. After debugging it and reaching…

Microsoft Security | Microsoft Entra | Microsoft Entra ID
asked 2026-02-21T21:28:02.7933333+00:00
efi 20 Reputation points
accepted 2026-02-26T14:06:53.6533333+00:00
efi 20 Reputation points
1 answer

My microsoft reward cant verify!!!

When i claim my reward, it got me to the verification tab, I have already done the step, entered 6 digits in my phone, It really said verificated successfully, but nothing happen when I press next, still my points, no giftcard. I tried claimed rewards on…

Bing | Microsoft Rewards
Bing | Microsoft Rewards

A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.

7,299 questions
asked 2026-02-26T13:26:09.43+00:00
Duy Hùng Đỗ 0 Reputation points
answered 2026-02-26T14:06:53.47+00:00
paulr0511 44,705 Reputation points Independent Advisor
1 answer

Delivery problem to Outlook/Hotmail - IP 149.102.159.175 - Error S3150

Hello, I am the administrator of the mail server for onda15.com (IP: 149.102.159.175). We are experiencing permanent delivery failures when sending emails to Outlook/Hotmail recipients. Error details: 550 5.7.1 Service unavailable; Client host…

Outlook | Web | Outlook.com | Email
asked 2026-02-26T13:31:38.5233333+00:00
ONDA 15 CASTALLA 0 Reputation points
answered 2026-02-26T14:05:51.0166667+00:00
EmilyS726 232.3K Reputation points Independent Advisor