You can save a new map that you have just created to SharePoint or a Web location, and then continue to work on it, or close it.
Do one of the following
Click the File tab , and then click Save.
Click Save on the
Quick Access toolbar.
Press CTRL+S.
In the dialog, navigate to the location where you want to save the map, and enter a File name.
Click Save.
The new map is saved to the server. It remains locked until you close it. You can continue to work on the map and save it when you are finished.
If you are using a SharePoint server, you may want to check out the map while you continue to work on it.