Web add-in not loading in old Outlook windows version about office-js

[neprasad-microsoft]

Hi @mailchecktool-admin
Since this is only occurring for a subset of users, we will need some more information to debug -

• Please collect logs and share with us. Steps to collect logs - https://github.com/OfficeDev/office-js/wiki/Collecting-log-files-for-Outlook-Add%E2%80%90ins-issues
• Does this happen only on Legacy Outlook or New Outlook, Outlook on the Web and Mac also?
• How many users are impacted?
• What do you mean the add-in has ceased to function? If possible, attach a working and a non-working video.
• For the accounts where it is not working, does sideloading work?

For sharing files, you can create a private repo and give access to exextoc.

[mailchecktool-admin]

We will share logs and screen recordings of any glitches that occur.
▷https://github.com/mailchecktool-admin/addinError

We have created an add-in that displays a pop-up when sending an email, but when the email is sent, the extension does not work and goes through.
Additionally, the icon that used to appear in the extension list is no longer displayed.
Please check the screen recording you have made for detailed operation.

I have confirmed that this occurs in the new Outlook, Outlook on the Web as well as the traditional Outlook.
I have not been able to confirm this for Mac as I do not have the media.

We are currently receiving similar inquiries from three companies that are deploying add-ins.

We have confirmed that this event does not occur when the add-in is installed individually as a custom add-in, but occurs when the add-in is deployed from the Microsoft Management Center.

Please review the contents and investigate.

[neprasad-microsoft]

Hi @mailchecktool-admin
The logs you shared do not have all the data. Please start collecting the logs before you launch Outlook on the Web .
Also, if possible, share the manifest of your add-in so that we can repro and debug locally.
"We have confirmed that this event does not occur when the add-in is installed individually as a custom add-in, but occurs when the add-in is deployed from the Microsoft Management Center."
Do you mean that the issue is only on locally installed add-ins?

[mailchecktool-admin]

New log information was obtained and the repository was updated.
The problem occurs “when deployed from Microsoft Management Center”.

Since this is a private program and I cannot share it here, I would like to know a reliable email address to send it to so that I can share it via email if necessary for the investigation.

[neprasad-microsoft]

Hi @mailchecktool-admin
The new HAR file attached is corrupted. We are unable to open the file and it gives "Invalid File" error. Could you please attach the logs again?
Also, you can share the manifest in the same private GitHub repo and we can let you know once we download it. After that you can delete it.

[mailchecktool-admin]

My apologies. I have re-submitted the corrupted HAR file as “outlook.office.com.zip”.

[mailchecktool-admin]

I have shared the manifest file with you.
▷https://github.com/mailchecktool-admin/addinError/blob/main/manifest.xml

[mailchecktool-admin]

We will share additional information with you.
[On the screen I checked from [https://aka.ms/olksideload], I see an add-in both in “Personal Add-Ins” and in “Admin Management” (the name of the add-in is Mail Checker).

However, the add-in is not displayed on the Microsoft365 application screen that is displayed from the □ Add-in button > [Add App].

When sending an email, the email is sent without the startup message being displayed, so I suspect that the ItemSend event is still not being executed.

[mailchecktool-admin]

@exextoc 　@neprasad-microsoft
Have you made any progress in your investigation based on the information I shared?
Please let me know if you have made any progress.

Also, please let me know if there is any additional information you would like me to share.