MS Office 2016 error popup

I have a couple of PCs that are issuing an error popup when a user opens Outlook. The popup can be reproduced at will by closing and opening Outlook each time. This happens for all users on the particular PC.

error message
Troubleshooting

  • Run an Online Repair of MS Office
  • Uninstall/reinstall of MS Office 2016 (O365)
  • Run dism
  • Run sfc
  • Run in safemode
  • Disable Addons

I am not seeing any errors pertaining to this in the Event Viewer. This popup doesn't seem to hinder the ability to use Outlook - mail can still be sent and received. This seems to be more of an annoyance than anything because after clicking OK, Outlook performs as normal.

PC Spec
Dell 7040
i5-6500T
Windows 10 Pro x64
MS Office 2016 (O365 Business Retail x86)
8GB RAM
Member_2_6375190Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Reece DoddsCommented:
It seems to be related to a software called Add-In Express (https://www.add-in-express.com/).
I'd suggest looking for that software in the Programs and Features and either reinstalling or uninstalling.
If you can't locate it, do a search in the registry for 'AddInExpress.MSO.2005' and delete any entries pertaining to it.  Note that you should always backup before making any registry changes as you can damage the OS configuration and make the system unbootable.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Member_2_6375190Author Commented:
The one thing I did not try was looking in regedit. I appreciate your help and I have found the problem clear as day just as you have stated.
0
Member_2_6375190Author Commented:
Thank you.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Office

From novice to tech pro — start learning today.