
Go to the "People" or "Contacts" section in Outlook.
Select the folder or source containing the contacts you want to move or merge.
Press Ctrl + A
to select all the contacts in that folder or source.
Right-click on the selected contacts, and choose "Copy" or "Move to Folder" (the option might vary depending on your Outlook version).
Select your preferred destination folder (e.g., your main "Contacts" folder) and click "OK" or "Copy."
The selected contacts will be moved or copied to the chosen folder.