Hello @Shelli Burkhalter ,
This tag is for Azure Lab Services. For questions related to Outlook, please go to the Outlook forum:
https://answers.microsoft.com/en-us/outlook_com/forum
If you are using the Outlook Web App, there is a 32 KB limit for all templates which may result in this error message:
https://learn.microsoft.com/en-us/exchange/troubleshoot/outlook-on-the-web-issues/cannot-save-template-in-owa