Install & prepare GCRS

Step 2: Configure the Domino environment

To configure the HCL Domino environment for Google Calendar Resource Sync (GCRS) follow these steps.

Step 1: Identify a host Domino server

Notes resource bookings are held in the Domino Resource Reservations database. You can install GCRS on the server that hosts the Resource Reservations database or on a dedicated server in your domain.

Where possible GCRS should be installed on a dedicated server but the choice depends on the size of your environment and the number of resources being synchronized.

Step 2: Copy the GCRS templates

Using the Domino Administrator client, copy the Notes gcrs.ntf and gcrs-log.ntf templates from the distribution kit to the GCRS server and sign the templates with the server ID.

Step 3: (Optional) Register the service account DLL

Complete this step if you will be using a service account to access your Google Workspace Calendar resources. This isn't required if you are using 3-legged OAuth as your authorization method.

Copy the appropriate service account DLL file service_account_com_dll.dll from your installation kit to the Domino program folder on your GCRS server. This is typically the x:\Lotus\Domino folder, but the location might vary depending on your server’s configuration.

Note: If you are running a 32 bit version of Domino, copy the DLL file from the service account DLL Win32 folder. If you are running a 64 bit version of Domino, copy the file from the service account DLL x64 folder.

Register the DLL as follows:

  1. Start a command prompt in elevated mode. To do this, right click over the command prompt icon in the Windows Start menu, and select Run as administrator.
  2. Ensure you are in the correct folder. Move to C:\Windows\System32 for 32 bit Domino, or C:\Windows\SysWoW64 for 64 bit Domino.
  3. Enter the following command: regsvr32.exe c:\Lotus\Domino\service_account_com_dll.dll

    where c:\Lotus\Domino is your Domino program folder.

Step 4: Increase concurrent agents execution times

Edit the GCRS server document in the Domino directory to increase the number of concurrent agents and maximum agent execution times:

  1. In Server Tasks, click Agent Manager.
  2. Increase the max concurrent agents value by 1.
  3. Increase max LotusScript/Java execution times on the GCRS server.

The amount of time needed depends on the server load and the number of resources being synchronized. Start by increasing both the daytime and nighttime parameters to 60 minutes. The values can be increased later if needed.

Step 5: Add the GCRS server to the trusted server and remote console lists 

Note: This step is only necessary if GCRS is installed onto a dedicated server.

A dedicated GCRS server must have trusted server and remote console access to the server that hosts the Resource Reservations database.

  1. In the Domino directory, locate the server document for the server hosting the Resource Reservations database.
  2. Click Security and add the name of the GCRS server to:
    • Full Remote Console Administrator
    • Trusted servers.
  3. Save the server document.


Google, Google Workspace, and related marks and logos are trademarks of Google LLC. All other company and product names are trademarks of the companies with which they are associated.

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