Users encounter the error message 'No space available in the target datastore' when attempting VMware Replication in BDRShield.

The error occurs when the size of the source machine configured for replication exceeds the available storage space in the target datastore.

To resolve the 'No space available in target datastore' error, follow these steps:

1. Check the size of the source machine configured for replication.

2. Compare the source machine's size to the available storage space in the target datastore.

3. If the source machine size is greater than the available space in the target datastore, the error occurs.

4. Free up enough space in the target datastore by deleting unused files or VMs.

5. Alternatively, expand the target datastore size by adding a new extent. Refer to the documentation for detailed steps on expanding the target datastore: LINK

Note: Ensure proper consideration and backup of essential data before making changes to datastore configurations.