Close Outlook.
{Check in Task Manager to be sure it's not running in the background}

Delete the SRS file.

Just ONCE, run Outlook as Admin.
Starting Outlook as an Administrator on Windows 10 - Robert 365

Once Outlook has opened:
Open the Send/Receive Groups dialog. {Ctrl+Alt+s}
Select the "All Accounts" Group.
[Edit]
{Are your mail accounts listed?}
{Does each one have "[/] Include the selected account in this group" checked?
{Are the OK/Cancel buttons active?}

Close Outlook.
Restart as normal user.
{Check again}

2025-08-11 - Send Receive Dialog.png

2025-08-11 - All Accounts.png