The Start-AttachabilityCheck command forces an attachability check for all SQL Server databases protected by the Core. 
Usage
The usage for the command is as follows:
Start-AttachabilityCheck -core [host name] -user [username] - password [password] - protectedserver [machine name | IP address] -rpn [number | numbers] | -time [time string]
Command Options
The following table describes the options available for the Start-AttachabilityCheck command: 
| Option | Description | 
|---|---|
| -? | Display this help message. | 
| -core | Optional. Remote Core host machine IP address (with an optional port number). By default the connection is made to the Core installed on the local machine. | 
| -user | Optional. User name for the remote Core host machine. If you specify a user name, you also have to provide a password. If none are provided, then the logged-on user's credentials will be used. | 
| -password | Optional. Password to the remote Core host machine. If you specify a password, you also have to provide a user name. If none are provided, then the logged-on user's credentials will be used. | 
| -protectedserver | The protected machine on which to perform the SQL attachability check. | 
| -rpn | Optional. The sequential number of a recovery point on which to perform the SQL attachability check. You can use the  Note: If neither ‘time’ nor ‘rpn’ option is specified in this command, than the most recent recovery point is used for the attachability check.  | 
| -time | Optional. Determines recovery point to be selected for SQL attachability check. You need to specify exact time in the format “MM/DD/YYYY hh:mm tt” (for example: “04/24/2015 09:00 AM”).” Specify date time values of the time zone set on your local machine. Note: If neither ‘time’ nor ‘rpn’ option is specified in this command, than the most recent recovery point will be exported.  | 
Example:
Perform a SQL attachability check on the most recent recovery point for the specified protected SQL server:
>Start-AttachabilityCheck - protectedserver 10.10.9.120