Opening files as the host
To host a file so other users can access it as clients:
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If the file has associated lookups, related files, or uses external scripts, you must open and share those files as well.
Note  Avoid hosting files that are located on a remote or networked volume. For optimal performance, the file you're hosting should be on the hard disk of your computer.
When you share a file, by default it is visible to all other networked users via the Hosts tab in the Launch Center window. To prevent a shared file from appearing in this list, select Don’t display in Launch Center in the FileMaker Network Settings dialog box. This option is a good choice for sharing files that must be open but should not be accessed directly by users. These may include related databases, files with external scripts, and/or files that are used to generate a value list.
Before a host can close a shared file, all clients must close the file. FileMaker Pro allows you to prompt networked clients to close the shared file when you close the file, change the sharing conditions for the file, exit FileMaker Pro, or perform a task that requires all clients to close the file.
To enable a file for FileMaker Network sharing:
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Note  To enable or change a file’s sharing status, you must open it with an account that has Manage Extended Privileges access privileges. Users do not need to have Manage Extended Privileges access privilege to become the host of a database, but must have these access privileges to change the sharing status of a file. See About accounts, privilege sets, and extended privileges for more information.
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Click Share in the status toolbar, then choose Share with FileMaker Clients.
Or, choose File menu > Sharing > Share with FileMaker Clients.
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Once sharing is enabled for a file, the first user to open the file becomes that file’s host.
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For Network access to the file, choose an option.
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All users provides access to all FileMaker Pro and FileMaker Go users on your network.
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Specify users by privilege set limits network access to users based on their privilege set.
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No users prevents any access via FileMaker networking.
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To change a file’s sharing status:
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Click Share in the status toolbar, then choose Share with FileMaker Clients.
Or, choose File menu > Sharing > Share with FileMaker Clients.
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For Network access to the file, choose an option.
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All users provides access to all FileMaker Pro users on your network and to FileMaker Go users.
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Specify users by privilege set limits network access to users based on their privilege set.
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No users prevents any access via FileMaker networking.
To disable FileMaker network sharing:
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Click Share in the status toolbar, then choose Share with FileMaker Clients.
Or, choose File menu > Sharing > Share with FileMaker Clients.
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Tip  As the host, you can send a message to all clients accessing the database. Click Share in the status toolbar, choose Share with FileMaker Clients, then select the file to notify and click Send Message. Type a message in the Send Message dialog box and click OK. Clients see the message in a dialog box. They can dismiss the dialog box by clicking Cancel, or the dialog box will close automatically 30 seconds after appearing.
To close a shared file:
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If any clients have the shared file open, a dialog box lists those clients. Click Ask to send a message to these clients requesting that they close the file.
 
Once all clients have closed the file, FileMaker Pro closes the file on your computer.