I've run into a scenario where Outlook PST files are being placed in a read only mode. This is not ideal for managing email and keeping it for historical purposes.
In the following keys:
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\PST
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST
Setting the PSTDisableGrow to 0 will allow writing and setting it to 1 will disable writing.
Unfortunately, these registry entries require admin to modify.
Use a policy to control PST files in Outlook
If I am not an administrator but I want to read the registry, what is easiest way to do it?