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How to fix "550 5.3.5 Email sender's username is invalid" error when using Communication Services for SMTP application.

I was able to get very close to successfully setting up an application to send automated emails through my Microsoft account using the following…

Azure Communication Services
Azure Communication Services

An Azure communication platform for deploying applications across devices and platforms.

1,678 questions
asked 2024-07-28T22:38:07.29+00:00
TatMap 10 Reputation points
edited a comment 2026-01-28T19:16:03.5066667+00:00
Peter Brennen 20 Reputation points
3 answers

Youtube Glitching Out When Watching Shorts

Does anyone know why my YouTube keeps glitching out like this when I watch a short? If anyone has a solution to this, it would be greatly appreciated. https://drive.google.com/file/d/1dE94jCB1PQFIokTqF_DBSFuEfz2llHp0/view?usp=drivesdk

Windows for home | Windows 10 | Accessibility
asked 2026-01-14T06:59:39.1966667+00:00
Universal Time 5 Reputation points
commented 2026-01-28T19:15:28.0133333+00:00
Lucus-V 7,650 Reputation points Microsoft External Staff Moderator
3 answers One of the answers was accepted by the question author.

I just purchased Microsoft 365. Whenever I try to open any of the apps I get a "[App] quit unexpectedly" error message immediately. Help.

I just purchased Microsoft 365. Whenever I try to open any of the apps I get a "[App] quit unexpectedly" error message immediately. Again and again and again. Help.

Microsoft 365 and Office | Other
asked 2026-01-28T17:20:23.6533333+00:00
Nathan Willcox 20 Reputation points
commented 2026-01-28T19:15:16.5533333+00:00
John Jefferson Doyon 71,520 Reputation points Independent Advisor
4 answers

How do I get 1920x1080 screen resolution

1920x1080 screen resolution isn't listed. How do I get it? Thank you.

Windows for home | Other | Windows update
asked 2026-01-13T21:50:02.09+00:00
Pedro Báez 0 Reputation points
commented 2026-01-28T19:15:00.06+00:00
Lucus-V 7,650 Reputation points Microsoft External Staff Moderator
2 answers

Unable to Verify Identity for business Microsoft Account – Error 399287

I am experiencing an issue while trying to log in to my microsoft adminstrator account. All 3 options that I tried is facing the same issue. Approve request on authenticator: not receiving the request Use a verification code: The code is not being shown…

Microsoft 365 and Office | Subscription, account, billing | For business | Other
asked 2026-01-05T02:39:59.53+00:00
VT DISTRIBUTION 10 Reputation points
edited a comment 2026-01-28T19:13:19.0066667+00:00
Daniel-Vo 6,085 Reputation points Microsoft External Staff Moderator
2 answers

Account Hacked But im able to sign into it

This account im on right now was hacked, they changed my emailadress but kept the passwordthe same why can't i make my email the primary source now instead of 3 days from now

Outlook | Web | Outlook.com | Account management, security, and privacy
asked 2026-01-28T17:50:05.5366667+00:00
IwKey U 0 Reputation points
answered 2026-01-28T19:11:50.5933333+00:00
Jonathan Deives 73,715 Reputation points Independent Advisor
1 answer

When I sign into Microsoft Authenticator, it asks for the verification code that only the app can give me.

I am stuck in a forever loop of the app or any microsoft login in need of a verification code from the Authenticator. When the app is opened, no code is provided. Rather, I am asked to provide a code to login into the Authentication app from the app…

Microsoft Security | Microsoft Authenticator
asked 2026-01-28T19:11:06.6766667+00:00
Ava Butler 0 Reputation points
answered 2026-01-28T19:11:16.45+00:00

AI answer

1 answer

Is there a REAL solution or live support to reset/change Outlook password for email access?

Unable to reset/change Outlook password to access email via mobile or PC! Verification process doesn't work. Keep getting looped around Microsoft sites to find live/chat support for solution. Following repetitive solutions given are not helpful and…

Outlook | Outlook for mobile | Outlook for iOS | For home
asked 2026-01-28T19:09:45.85+00:00
Da Shznit 0 Reputation points
answered 2026-01-28T19:10:01.84+00:00

AI answer

3 answers

Problem with window licence

The system information, based on this screenshot, suggests that the Windows OS is not activated or use a non-genuine key, it's true?

Windows for business | Windows for IoT
asked 2026-01-28T15:14:11.3366667+00:00
Денис Назаров 0 Reputation points
answered 2026-01-28T19:09:21.25+00:00
Darrell Gorter 2,911 Reputation points
1 answer One of the answers was accepted by the question author.

Having trouble logging into my 365 mail as authenticator app not updated when i transfer to new phone

Hi, i am having trouble getting code from my mobile as information wasn't transferred over to new phone. previously i had the option of signing in with password but this time its not in the options tab. Would like to seek help in getting back to my…

Microsoft 365 and Office | Subscription, account, billing | For business | Other
asked 2026-01-06T06:28:47.6133333+00:00
JL 20 Reputation points
edited an answer 2026-01-28T19:08:16.1633333+00:00
Daniel-Vo 6,085 Reputation points Microsoft External Staff Moderator
1 answer

Excel Sign In Issue

I use Excel to export patient schedules from another system and recently it is having me sign in---however, when signing in I receive any error message---Error something went wrong [7q6a] + Code: -2147023584. I did log in to Microsoft 365 with no issue,…

Microsoft 365 and Office | Excel | For business | Windows
asked 2026-01-27T14:09:05.01+00:00
Leila MacQueen 0 Reputation points
commented 2026-01-28T19:07:53.3766667+00:00
Alexis-NG 16,270 Reputation points Microsoft External Staff Moderator
2 answers

Problem embedding Microsoft Forms inside a custom web application

I’m working on a custom web application for a project called [Funnelsflex], and I need to embed a Microsoft Form into one of the pages. The form works fine when opened directly, but when I embed it using the iframe code, it sometimes fails to load or…

Microsoft 365 and Office | Microsoft Forms | For business
asked 2026-01-24T15:51:31.4+00:00
faadi jutt 0 Reputation points
edited an answer 2026-01-28T19:03:04.6433333+00:00
Daniel-Vo 6,085 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Anmeldung bei Azure Portal geht nicht

Hallo Zusammen, kann mir bitte jemand eine Emailadresse vom Microsoft Azure Support geben. Ich kann auch kein Ticket aufgeben, da der Login zu Azure Portal nicht geht. Ich weiß, die Fehlermeldung im Screenshot heißt, dass die Subscription inaktiv bzw.…

Azure Storage
Azure Storage

Globally unique resources that provide access to data management services and serve as the parent namespace for the services.

3,859 questions
asked 2026-01-08T14:43:12.72+00:00
Christian Mack 20 Reputation points
edited the question 2026-01-28T18:59:33.1933333+00:00
Alexandra Tanasescu 0 Reputation points Moderator
1 answer

Recurring Meeting via Booking Page

Hi Team, I did some research for booking page and found that currently there is no way to create a recurring meeting from booking page. The only alternate way is through create a recurring from Outlook only. It seems this request was raised by many…

Outlook | Web | Outlook on the web for business | Settings
asked 2026-01-28T15:40:48.4733333+00:00
Girjashankar 0 Reputation points
answered 2026-01-28T18:57:01.6+00:00
Ruby-N 11,735 Reputation points Microsoft External Staff Moderator
1 answer

Word Auto-Recovery doesn't always work

Yesterday my computer lose power while Word was probably open (I thought I closed and saved it manually before, but I found that it's not saved, so probably I've mistaken). And there's no AutoRecovery of it! Yes, AutoRecovery is turned on. I think it's…

Microsoft 365 and Office | Word | For business | Windows
asked 2026-01-28T18:44:02.51+00:00
New Editor 0 Reputation points
edited an answer 2026-01-28T18:56:23.2966667+00:00
Stefan Blom 341.5K Reputation points MVP Volunteer Moderator
2 answers

Windows 11 Audio Devices Disappear After Boot – High Definition Audio Device Code 45

I am facing a persistent audio issue on Windows 11. some time sound work perfectly fine but every cold boot or restart, sound gone no output also says no output device found, tried multiple device didnt work In Device Manager: “High Definition Audio…

Windows for home | Windows 11 | Devices and drivers
asked 2026-01-03T13:20:33.6033333+00:00
No One 0 Reputation points
commented 2026-01-28T18:54:56.0833333+00:00
Regina S 0 Reputation points
2 answers

Cancel Microsoft 365 Business Standard

Hello, I am trying to cancel my subscription. However the recipts im getting each month is not the email to login to business standard account." It says that it is a personal account please try again" What do I need to do to cancel services?…

Microsoft 365 and Office | Subscription, account, billing | For business | Other
asked 2026-01-28T17:47:33.9833333+00:00
Jack Cummings 0 Reputation points
answered 2026-01-28T18:52:53.9433333+00:00
Chris Duong 8,985 Reputation points Microsoft External Staff Moderator
1 answer

HP Laptop 16-d0xxx SSD SLOTS

HP Laptop 16-d0xxx has how many ssd slots and which battery does it contain for replacement

Windows for home | Other | Devices and drivers
asked 2026-01-28T14:35:36.1233333+00:00
dhruv 0 Reputation points
edited the question 2026-01-28T18:52:34.9333333+00:00
Gérard Oomens 122.8K Reputation points Volunteer Moderator
2 answers

how to download SecurityHealthSetup.zip

Having blank screen in windows security and not able to do any thing

Windows for home | Windows 10 | Desktop, Start, and personalization | Other
asked 2025-11-02T18:37:22.04+00:00
Prachet Jariwala 5 Reputation points
commented 2026-01-28T18:52:33.3633333+00:00
Gwes 0 Reputation points
2 answers

Anulowanie subskrypcji nadanej przez was na nieistniejące konto [Uwaga moderatora: usunięto dane osobowe]@KancelariaDoradztwaPodat420.onmicrosoft.com

Próbowałam nabyć subskrypcję Microsoft Teams na konto [Uwaga moderatora: usunięto dane osobowe]@kldppodatki.pl. Przy nabywaniu subskrypcji nadaliście mi jakieś nieistniejące konto [[Uwaga moderatora: usunięto dane…

Microsoft 365 and Office | Other
asked 2026-01-21T13:01:23.8766667+00:00
Katarzyna Łukaszewska 0 Reputation points
edited the question 2026-01-28T18:52:05.7133333+00:00
Daniel-Vo 6,085 Reputation points Microsoft External Staff Moderator