EWS-Office365-Contact-Sync VS Set-OutlookSignatures

Like this one: https://github.com/grahamr975/EWS-Office365-Contact-Sync

We have been using EPIC to push contacts etc to our users since most of them are on company iPhones and iPads and cannot access the GAL easily. However our version is old so I did some digging and found out that it can be managed through powershell using EWS. I scripted my own custom one for ourselves but there's a few examples online- https://github.com/grahamr975/EWS-Office365-Contact-Sync

Set-OutlookSignatures might be what your are looking for: https://github.com/Set-OutlookSignatures/Set-OutlookSignatures

In my experience, the easiest way is to use a software for central management of signatures, such as Set-OutlookSignatures. Set-OutlookSignatures not only allows you to use Word or HTML templates, it also includes features to ensure maximum signature compatibility across different mail clients. There is also a lot of other features that come in handy, such as support for roaming signatures.

I've heard positive things from this project: https://github.com/GruberMarkus/Set-OutlookSignatures

there is 3rd party tools out there (for example CodeTwo), there is also a very good powershell option https://github.com/GruberMarkus/Set-OutlookSignatures

A service like code two is most of the time worth the money, but if you really want to go the code way have a look here: https://github.com/GruberMarkus/Set-OutlookSignatures

A redditor posted his solution some time ago and we use it at work. It's a PowerShell script that gets the data from AD or AAD and creates signatures based on a template. Check https://github.com/GruberMarkus/Set-OutlookSignatures (manually typed link, so excuse any errors).