Using classic Outlook for Windows in business environments
Your client has a current Office version, possibly o365 Buisiness, presumably desktop components.
And VBA/Macros are fully supported, you, the client, have to enable macroes as per this MS Kb https://support.microsoft.com/en-us/office/enable-or-disable-macros-in-microsoft-365-files-12b036fd-d140-4e74-b45e-16fed1a7e5c6
In adition;
O365/Office when installed under a Win user admin account, and run from that admin account, auto logs in when the PC is started. There is no separate login for any component.
Win search for Word > Resulting shortcut > Rt click > Pin to task bar > start Word from that shortcut (hover mouse over the shortcut gives access to the 10 most recent docs)
Same for other core components.
Start eg Word open an old doc via recents/search
Rarely any need to access OneDrive itself.