Issue:
If the deploy button is grayed out for an imaging task sequence, it may be because you have not yet created a valid client package.
Resolution:
Package the current client upgrade:
Navigate to: “Software Library” > “Application Management” > “Packages”
Right click the packages node > select “Create package from definition”
Right Click the “Configuration Manager Client Upgrade” package > Select “Distribute Content”
distribute the content to all distribution servers
Update the Imaging Task Sequence:
Navigate to: “Software Library” > “Operating System Deployment” > Right click the imaging task sequence > Edit
Update the “Setup Windows and Configuration manager” step with the new Client Package created above.
The “Deploy” option should now be available