topic Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to acknowledg in Galaxy S25

April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to acknowledg

JessR904 — Sat, 18 Apr 2026 02:51:46 GMT

Posting this as both an affected user and an IT Support Specialist. If you're on an S25 Ultra and your Microsoft apps started failing after the April 2026 security patch, you're not alone and it's not your setup.

Symptoms I'm seeing:

Teams loses presence indicators, messages hang unsent

Authenticator stops firing push notifications

OneDrive folder operations fail

Outlook, ToDo, Excel also affected intermittently

Reboot temporarily restores function but the window is shrinking

What I've already tried, none of which holds:

Force close and relaunch

Clear cache and data

Uninstall and reinstall from Play Store

Re-sign in to all accounts

Updated Google Play Services

Diagnostic signal Samsung engineering should care about:

Installing the same Microsoft apps inside Secure Folder restores normal function. That narrows the problem to the main user profile's handling of something these apps depend on, and Knox container isolation bypasses it. My read: token exchange, account sync, or a background service regression introduced by the April SMR.

Cross-device comparison also isolates it cleanly. S26 Ultra and Z Flip 6 users on equivalent firmware are not reporting this. It's specific to the S25 Ultra April 2026 build.

What I've done so far:

Filed a Samsung Members error report with logs

Contacted Samsung tech support via text (currently in progress)

Contacted Microsoft support, who is pointing back at Samsung as the source

What I'm asking Samsung for:

Public acknowledgment that this regression exists

Estimated fix timeline - is it rolling into the May 2026 SMR or is a hotfix planned

Guidance on whether One UI 8.5 stable release will include the fix

Device info:

Galaxy S25 Ultra (SM-S938U1, US unlocked)

One UI 8.0, Android 16

Build: BP2A.250605.031.A3.S938U1UES9BZBH

Service: T-Mobile

If you're experiencing this, please reply with your device model, firmware build, and carrier. The more of us on record, the harder Samsung has to prioritize the fix. This is a work-critical issue for a lot of people, and the current silence from Samsung is not acceptable for a flagship still well inside its support window.

Issues with Microsoft apps after April 2026 security update

user4321 — Mon, 13 Apr 2026 19:53:15 GMT

I have an s25 ultra and after the April 2026 security patch MS Teams and MS authenticator will work fine and then all the sudden they stop. I can open teams but everyone's status goes away and if I IM someone it just sits there sending. Also when that happens I stop getting notifications from MS authenticator. Sometimes I can't even get into the authenticator app. So far the only way I have found to temporarily fix it is to reboot the phone. That is getting annoying.

I tried the common force close, delete cache and even delete data. Uninstall the app and reinstall. Nothing works but a reboot. Started happening for me right after the April 2026 security update to my S25 ultra on Verizon.

Re: Issues with Microsoft apps after April 2026 security update

meself — Tue, 14 Apr 2026 00:45:15 GMT

I would contact Microsoft

Re: Issues with Microsoft apps after April 2026 security update

userQlvQ0CUkNq — Tue, 14 Apr 2026 14:33:23 GMT

I am having the exact same issue.

Re: Issues with Microsoft apps after April 2026 security update

Innanenights — Tue, 14 Apr 2026 22:28:08 GMT

Sadly, I'm having this problem as well. It's making work rather difficult as we use authenticator and power apps for a lot of our day to day.

Really home MS and Samsung fix this bug sooner than later and not ignore it.

Was able to access authenticator by enabling secure folder. Haven't played around with the rest of the apps yet, however.

Re: Issues with Microsoft apps after April 2026 security update

eljoescobar — Wed, 15 Apr 2026 18:16:48 GMT

S24U here. April Security update still not released and same issue with M365 apps.

It seems unrelated with the security update. It should be something else. I also tried restarting and reinstalling and it works once or twice and then stop working again.

Everything is workprofile and secured folder works

Re: Re: Issues with Microsoft apps after April 2026 security update

user4321 — Thu, 16 Apr 2026 00:09:09 GMT

Well that stinks but it's good information.

Re: Issues with Microsoft apps after April 2026 security update

littlebitsmart — Thu, 16 Apr 2026 02:33:41 GMT

I'm using s26 ultra, i am facing the same issue,
If i send a message , it is unsent.
Joining meeting is not happening.
Attending calls is not happening.
Receiving notifications but not all the time, not sure how i am getting notifications occasionally, can't predict the pattern.

Restart, uninstall and reinstall also doesn't help connecting.

Pls let me know if you have any solution.

Microsoft apps stopped working (timeout or close after flashing an error)

ArmyVet717 — Thu, 16 Apr 2026 19:11:53 GMT

All of my Microsoft Apps stopped working. I've tried to uninstall and reinstall, and still nothing. I can't log in, the Apps timeout or close after flashing an error. Has anyone had this issue?

Sam

Galaxy S25 Ultra

Re: Microsoft Apps

meself — Thu, 16 Apr 2026 02:35:57 GMT

Need to contact Microsoft

Re: Re: Microsoft Apps

ArmyVet717 — Thu, 16 Apr 2026 02:36:53 GMT

Tried that, they are saying it's a phone issue.

Re: Re: Re: Microsoft Apps

meself — Thu, 16 Apr 2026 02:38:28 GMT

Its there app not samsung or anyone else's I know not trying to be bad but you get what I'm saying

Re: Re: Re: Re: Microsoft Apps

ArmyVet717 — Thu, 16 Apr 2026 02:40:44 GMT

No worries, just saying they are blaming Samsung and the phone. But, it sounds like others are having the same issue and not just MS apps.

Re: Microsoft Apps

Mujibar — Thu, 16 Apr 2026 02:46:11 GMT

I've seen similar complaints about MS apps suddenly not working. Haven't seen any discernable patterns, though. And they're working for me on multiple Android devices.

Re: Issues with Microsoft apps after April 2026 security update

ArmyVet717 — Thu, 16 Apr 2026 02:46:40 GMT

Glad I'm not the only one having an issue. Sad there is no fix!

Re: Microsoft Apps

ArmyVet717 — Thu, 16 Apr 2026 02:48:16 GMT

My S21 work phone is operating just fine (for now), seems its just my S25U.

Re: Microsoft Apps

JerryDavis65 — Thu, 16 Apr 2026 02:57:38 GMT

I had issues with outlook not working correctly this afternoon, but it finally cleared up this evening and is back to normal.

Re: Re: Microsoft Apps

KjnGj — Thu, 16 Apr 2026 05:57:09 GMT

Yes My Samsung Internet is gone and I haven't been able to get it back yet

Re: Microsoft Apps

Chocolatechipp — Thu, 16 Apr 2026 07:35:12 GMT

My son's S22 did that certain apps quit working . Nothing we tried helped. Phone was old so upgraded to S26.

Re: Issues with Microsoft apps after April 2026 security update

drowley — Thu, 16 Apr 2026 08:38:17 GMT

Was looking for answers to this to help one of our employees and found this link with a possible solution: https://learn.microsoft.com/en-us/answers/questions/5858412/ms-authenticator-app-not-working-after-android-upd