--- title: "Configuring Common Parameters" description: "When you create a custom script step, you can set a list of default parameters for script execution. Orchestrator already includes a number of out-of-the-box common default parameters that you can modify as described in section Adding Custom Scripts." canonical: "https://helpcenter.veeam.com/docs/vro/userguide/script_common_parameters.html" breadcrumb: "User Guide > Managing Custom Scripts to Veeam Recovery Orchestrator > Adding Custom Scripts > Configuring Common Parameters" dateModified: "2026-08-26" --- # Configuring Common Parameters When you [create a custom script step](uploading_scripts.md), you can set a list of default parameters for script execution. Orchestrator already includes a number of out-of-the-box common default parameters that you can modify as described in section [Adding Custom Scripts](uploading_scripts.md). ::: important To allow the script to run inside the guest OS of a processed machine, it is required that you have Microsoft PowerShell 3.0 and .Net Framework 4.0 installed on each machine for which you enable this step. :::

Parameter	Description	Default Value
Critical Step	Defines whether the step is critical for machine recovery. If you mark the step as Critical, its failure for a machine from a critical inventory group will halt the plan.	No
Run Step During a DataLab Test	Defines whether the step will be executed during plan testing in a DataLab.	Yes
Run Step During Undo and Failback	Defines whether the step will be executed during the Failback and Undo Failover operations.	Yes
Timeout	Maximum amount of time (in seconds) for the step to execute.	600
Retries	Number of retries that will be attempted if the step fails on the first try.	3
Script Execution Location	Defines whether the script will run on the Veeam Backup & Replication server, on the Orchestrator server or on the in-guest OS. Note: This parameter cannot be changed when restoring VMs to a Microsoft Hyper-V environment.	Veeam backup server
Windows Credentials*	Credentials required to gain access to the in-guest OS. Note: Applies only if the Script Execution Location parameter value is set to In-Guest OS.	—

[*This parameter is not required for custom scripts running inside guest OSes of machines included in cloud plans because these scripts are executed under the *NT AUTHORITY\\SYSTEM* account.]{.Small_Text} To specify credentials that the script will use to run within the guest OS of a processed machine, follow the instructions provided in section [Configuring Windows Credentials Parameter](customizing_credentials.md).