I didn't want to create a new thread but this pertains to version 2.1.2.
I attempted to install Esri Maps for Office version 2.1.2 on my machine. I currently have MS Office Professional Plus 2010 Version 14.0.7106.5003 (32-bit). However after an install, restart, un-intall and re-install neither Excel nor Powerpoint load properly. Both programs will load and display similar error messages posted in this thread. As soon as I un-install Esri Maps for Office both Excel and Powerpoint load as expected.
I have attempted two different types of installing methods for the ArcGIS Connection Settings, both of which produced the same results: (1) ArcGIS Online and (2) My ArcGIS Online Organization.
This may be an internal/firewall issue but I wanted to post in case others were having similar issues. Please assist as I have been looking forward to using Esri Maps for Office and have not gotten my hands wet yet!
If you will be 'deploying' the Maps for Office package to your users and they DON'T have admin on their computers then you should tweak the msi so that the 'check for updates' option is turned off after installation (i.e., in Excel you will find this setting in File | Esri Maps). If you have access to an MSI editing tool like Orca, just go to the Property Table and change the "CheckboxForUpgrade" properties valu to 0, ensure ALLUSERS is set to 1. Other option would be to just go to the Upgrade Table and change the versionmin number to a large value like 3.0 so an upgrade never can occur.