Company selection window
If your company is set up for Remote Data Access, you'll have a Remote Data Access column and it will say either Online or Offline alongside your company. If it is blank then it is not on Remote Data Access.
NOTE: In Sage 50 Accounts v27 and below, this is also where you can check if you're at a main or remote site.
[BCB:95:Accounts - RDA_hub:ECB][BCB:91:Support message - RDA / Drive chat:ECB]