topic Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn.. 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.

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

Mujibar — Sat, 18 Apr 2026 02:54:11 GMT

Known issue. See this thread for discussion:

https://us.community.samsung.com/t5/Galaxy-S25/Issues-with-Microsoft-apps-after-April-2026-security-update/td-p/3534626?src=ShareByUserCM

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

BarryBoone-TI-994A — Sat, 18 Apr 2026 05:18:30 GMT

Have you tried setting Private DNS to Off and rebooting? It cleared up my Microsoft authentication issues in multiple apps once I did that. I think Samsung started proxying DNS through outside servers instead of letting the ones configured by the network handle DNS requests. Might explain why putting the apps in the Secure Folder bypasses these issues.

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

ArmyVet717 — Sat, 18 Apr 2026 14:41:17 GMT

S25U, Verizon

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

ArmyVet717 — Sat, 18 Apr 2026 14:46:23 GMT

I'm a little uneducated about secure folders. How do you create one then install Apps in it?

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

Shane-Moore — Sat, 18 Apr 2026 15:48:14 GMT

Hi all. Experienced this exact issue with my Samsung S25 ultra. Found a solution which worked for me at My Microsoft Apps have stopped working on my Samsung Ultra S25 - Microsoft Q&A

Essentially:

This issue was due to a WebView regression from the Samsung April 2026 security update.It can be resolved by following these steps:

Settings -> Search for "Android System Webview" -> App Details In Store -> Remove Updates
Reboot
Settings -> Search for "Android System Webview" -> App Details In Store -> Update
- Note: If "Android System Webview" doesn't appear in the app list, go to:
  Settings -> Google -> All services -> System Services -> Select "Android System Webview"
Reboot
Launch Teams/Outlook & log in.

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

jburwash — Sun, 19 Apr 2026 15:17:23 GMT

That worked perfectly. Thank you for the help.

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

adammarch — Sun, 19 Apr 2026 15:58:15 GMT

worked for about 15 minutes, now issue has returned, authenticator not responding

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

useruYPP4ox9W2 — Sun, 19 Apr 2026 16:53:57 GMT

Galaxy S26 Ultra
SM-S948U
One UI 8.5, Android 16
Build number
BP4A.251205.006.S948USQS2AZCO

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

LaLaLisa — Mon, 20 Apr 2026 00:56:32 GMT

I cannot open Outlook or Teams as of today on my Galaxy S26Ultra. This is a huge problem for me!!

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

Texan007 — Mon, 20 Apr 2026 05:19:26 GMT

Thank you so much, @Shane-Moore. I have March 2026 update on my S25 Ultra. My Outlook, Teams, Copilot and more of Microsoft apps stopped working since yesterday! This was affecting my work account as well. I did exactly the steps you have outlined and, bingo, my outlook, teams, copilot started working. Thank you, again.

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

RyanStelzer — Mon, 20 Apr 2026 07:56:18 GMT

As of Saturday (18 April 2026), limited functionality or no functionality for Microsoft apps (Teams, OneDrive, Outlook, etc.). Very frustrating as I thought it was an issue on Microsoft's end. After finding no reported Microsoft issues, I started searching here.

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

Members_jCC9LAg — Mon, 20 Apr 2026 07:57:14 GMT

I also have the problem

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

Kathrynallen29 — Mon, 20 Apr 2026 10:09:39 GMT

I have an S25 Ultra and my Outlook stopped working yesterday. This is my work email account, and now I can't access it from my phone. I restarted and that worked once, but I can't uninstall it to reinstall, and now I'm just stuck with no access.

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

thatcharlie — Mon, 20 Apr 2026 12:36:39 GMT

Issue exists on Samsung 24+ also.

Re: April 2026 patch broke Microsoft apps on S25 Ultra - Samsung needs to ackn..

SIRCHOPPY — Mon, 20 Apr 2026 13:44:06 GMT

When is expected fix?

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

mlf — Mon, 20 Apr 2026 14:10:35 GMT

Found this fix on Reddit which worked and then on Saturday the apps outside the secure folder started working again - I had to add the app to the secure folder. https://www.reddit.com/r/microsoft365/comments/1sjp9pg/is_anyone_else_having_problems_with_microsoft/

Today though my calendar is wiped out on my S25. Thankfully it is still on my outlook server when I log in from a computer

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

Plantan0615 — Mon, 20 Apr 2026 15:04:25 GMT

Device Info: Samsung Galaxy A56 5G (SM-A566B/DS, UK locked), Carrier is 3 (aka Three), One UI 8.0, Android 16, Build is BP2A.250605.031.A3.A566BXXSABZD1

I am having consistent issues with MS Authenticator, MS Teams, MS Outlook, and PhoneLink.
MS Authenticator does not receive push notifications at all, and it does not show my biometric-based or my PIN-based unlocking mechanisms, so I'm just stuck on the initial "awaiting login screen"; my university accounts are only accessible via MS Authenticator, so I am unable to access these accounts at all at the moment (if they're not already logged in).
MS Teams is not updating correctly, does not allow me to send messages (they just get stuck as "unsent"), and it doesn't allow me to create any new meetings on mobile.
My Outlook inboxes are not updating correctly for any account (personal and university accounts all affected/ not updating), so I tried clearing the cache and app data, but now I cannot re-add the accounts to my Outlook app on mobile at all. I enter my email address (have tried this with all 4 of my MS email accounts), it pretends to load, and without returning any errors, kicks me back to "enter your email address."
PhoneLink consistently asks me to "reconnect my device" to my computer, but once I do, it says that it's linked on the phone, but my computer treats it as if the phone is still disconnected.

Aside from PhoneLink, all issues are exclusively on my mobile device, and work correctly on desktop.
I don't have any settings related to "webviewer" that I can access on my A56, rendering the immediate online advice useless. I have tried clearing the cache and app data, and I have tried uninstalling and re-installing all affected apps, both of which have only caused more issues, as noted above. Countless phone restarts and hard shutdowns/reboots, which only help temporarily with MS Authenticator exclusively. Basically, anything Microsoft is not functioning correctly at all on this device, with no obvious solution.

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

boba_fatt — Mon, 20 Apr 2026 16:35:03 GMT

This is also happening on my Fold 7. Major pain, and unacceptable.

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

NayeemR — Mon, 20 Apr 2026 17:40:57 GMT

It worked.. many thanks