Office 365 apps install failed error 0x0000426A

Question

Office 365 apps install failed error 0x0000426A

RD_Ogri 6

Hi all ,

I am trying to deploy Office 365 apps to our O365A3 users by InTune. The deployment is on fresh W10 19043.928 installs, mostly on Lenovo T440s'.

The installs have failed with error code 0x0000426A on all machines. I have asked the same question on the general Microsoft forum and a MSFT user has pointed me to you.

The InTune config is as below

I'm not very experienced with Microsoft administration (we are migrating from an onprem linux environment) so I strongly suspect I have made a mistake in my config at some point. Forgive me if I have missed something obvious or simple.

The documentation for this process is a bit confusing and seems slightly out of date with regards to the new Endpoint admin centre.

I have tried amending the assignments to just include "Required" for the sec group "A3 Users", and have set "Use shared computer activation to" no. We have also tried uninstalling the bundled Office app which is included.

Does anyone have a suggestion about how to proceed?

All the best.

Ogri

Mark Harris 6 Reputation points

2021-06-13T20:52:02.57+00:00

We've been experiencing the same issue.

Brand new devices deployed using Autopilot and White Glove.

Deployment was working absolutely fine, until the update channel was changed. It was on Semi Annual Enterprise. We changed it to Monthly Enterprise and we started getting these errors.

We changed it back to Semi Annual, and the deployment started working again after a couple of hours. Thinking that it may have been coincidence, we changed the channel back to Monthly and the errors started again.

We also set up a test deployment using the Current channel, and that was also fine.

Wondering perhaps if there is an issue with the Monthly Enterprise Channel deployment?
Mark Harris 6 Reputation points

2021-06-13T22:12:04.843+00:00

We've also seen additional error codes when installs fail using the Monthly Enterprise update channel.

Specifically 0x0000426C and 0x00002EE7

Swap the config back to semi annual, and the errors disappear.
Mark Harris 6 Reputation points

2021-06-14T14:03:01.077+00:00

So, after raising a support call, the support agent says they recommend using the SAC for deploying the apps....

Which kinda goes against the banner displayed across the top of the apps overview
Didier 0 Reputation points

2023-06-26T15:17:55.7533333+00:00

Hi All,

We are experiencing the same issue. The strange thing is that everything was working well in our organisation. We did some tests and were able to deploy Office 365 using the endpoint management console, and suddenly, it stopped working. In our settings, we requested that the former desktop app be deleted (Office 2019). We tested what you recommended and changed the update channel, but it still fails. I recreated a new deployment app, but it is still the same. As several people have this issue, I assume it's a Microsoft priority. Can someone help us with this issue?

Thank for the help you can provide.

Didier

4 answers

Your answer

Mark Harris 6 Reputation points

2021-06-13T20:52:02.57+00:00

We've been experiencing the same issue.

Brand new devices deployed using Autopilot and White Glove.

Deployment was working absolutely fine, until the update channel was changed. It was on Semi Annual Enterprise. We changed it to Monthly Enterprise and we started getting these errors.

We changed it back to Semi Annual, and the deployment started working again after a couple of hours. Thinking that it may have been coincidence, we changed the channel back to Monthly and the errors started again.

We also set up a test deployment using the Current channel, and that was also fine.

Wondering perhaps if there is an issue with the Monthly Enterprise Channel deployment?
Mark Harris 6 Reputation points

2021-06-13T22:12:04.843+00:00

We've also seen additional error codes when installs fail using the Monthly Enterprise update channel.

Specifically 0x0000426C and 0x00002EE7

Swap the config back to semi annual, and the errors disappear.
Mark Harris 6 Reputation points

2021-06-14T14:03:01.077+00:00

So, after raising a support call, the support agent says they recommend using the SAC for deploying the apps....

Which kinda goes against the banner displayed across the top of the apps overview
Didier 0 Reputation points

2023-06-26T15:17:55.7533333+00:00

Hi All,

We are experiencing the same issue. The strange thing is that everything was working well in our organisation. We did some tests and were able to deploy Office 365 using the endpoint management console, and suddenly, it stopped working. In our settings, we requested that the former desktop app be deleted (Office 2019). We tested what you recommended and changed the update channel, but it still fails. I recreated a new deployment app, but it is still the same. As several people have this issue, I assume it's a Microsoft priority. Can someone help us with this issue?

Thank for the help you can provide.

Didier

Answer 1

SebMcCayen 6

I seem to have this issue too, have anyone found a solution when using the Current Channel since we don't want to leave this channel? :)

Ty R 0 Reputation points

2025-06-16T18:52:54.0133333+00:00

so what i believe is happening is if your computer is Autopilot Entra joined and have it assigned to users its not letting you install a the same thing that's included so if your m365 business premium its not going to need to push a office install as its part of the license and installs automatically.

Answer 2

Cici Wu-MSFT 1,191

@RD_Ogri I have done tests in my environment with Microsoft Endpoint Manager Admin Center and it worked. I noticed that you are using Microsoft administration? Can I know is it the portal of Intune? Also, Mark Harris mentioned changing the update channel for Semi Annual might work. Here is the update recommended use for office update.

Reference: Overview of update channels for Microsoft 365 Apps
Add Microsoft 365 apps to Windows 10 devices with Microsoft Intune

Answer 3

Iain Green 6

I can confirm I was also having this issue as part of a deployment for a customer, changing the deployment back to Semi-Annual has resolved the issue

Mark Harris 6 Reputation points

2021-06-14T13:09:02.823+00:00

Glad it worked for you also :-)

However, changing the update channel is a workaround, but not a solution.

I've just taken a vanilla device, enrolled using Autopilot.

I then created 2 fresh app deployments, one using the MEC and the other using SAC

Setup device as normal, everything compliant and green from a policy perspective.

Tried the MEC version in company portal, and it failed within 2 minutes, with no apps installed

Restarted the machine and tried the SAC version and it installed M365 Apps without issue.

Something not quite right with the MEC me thinks.
Iain Green 6 Reputation points

2021-06-14T13:13:21.9+00:00

Yes you are right, sorry I should of said "its working enough I can kick the issue down the road for a while".

It was holding up the whole of my deployment from even progressing, however SAC has now completed on multiple HW devices.
Cici Wu-MSFT 1,191 Reputation points

2021-06-15T02:15:11.577+00:00

As there is a workaround of this issue currently. It is suggest to create a Premier ticket to find the root cause and resolve this issue more effectively. Many features of our current products are designed and upgraded based on customer feedback. We strive to capture any negative reviews in order to ensure that we are continuously improving our products to meet our customers' needs. With your efforts, we are committed to improving our products. Here is the link: https://learn.microsoft.com/en-us/mem/get-support#the-support-experience

Answer 4

So this appears to have been resolved. Following an interaction with the IntuneSupport team on Twitter, they commented the following;

"There was a recent service incident (IT262216) that was posted to the SHD due to a recent Microsoft Office version update that introduced a code defect with language packs which led to impact and the same behavior you've described. We were able to reproduce the issue and revert the change, but if you start to experience the same behavior, please let us know!"

I've since tested this with 2 new devices, and one existing, and it appears to now be installing the apps as expected with the MEC selected.

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Office 365 apps install failed error 0x0000426A

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