We have a Excel Web Addin, that was deployed to a group of users using the Office 365 Admin Center. But the add-in is not visible in Excel 2016 (Version 1803,Build 9126.2275, Click to Deploy) for those users.
<MessageText>User must have a mailbox for name resolution operations.</MessageText> <ResponseCode>ErrorNameResolutionNoMailbox</ResponseCode>
I also came across this post
"No add-ins currently available." when deploying add-in using Centralized Deployment
that talks about enabling Exchange. I am not sure what that really means.
So any help is appreciated in understanding the issue and resolution.
Based on the error message, I’d assume you’re having issues with users not being assigned mailboxes, which are required to enable Centralized Deployed add-ins.
Could you try running through the compatibility checking steps outlines here? It will help provide more detail on the exact issue.
Download the compatibility checker here: https://www.microsoft.com/en-us/download/details.aspx?id=55270
Run the compatibility checker Start an elevated PowerShell.exe window.
Run the \Import-Module O365CompatibilityChecker\ command.
Run the \Invoke-CompatibilityCheck\ command, which prompts you for TenantDomain (for example, TailspinToysIncorporated.onmicrosoft.com) and TenantAdmin credentials, and then requests consent.
You can also find more ways to debug in this help article: https://docs.microsoft.com/en-ie/office365/admin/manage/centralized-deployment-of-add-ins?redirectSourcePath=%252farticle%252fDetermine-if-Centralized-Deployment-of-add-ins-works-for-your-Office-365-organization-b4527d49-4073-4b43-8274-31b7a3166f92&view=o365-worldwide#BKMK_UserAndGroupAssignments?omkt=de-CH&ui=de-DE&rs=de-CH&ad=CH