Use when

You make a modification to the package source, such as adding, changing, or deleting a file or folder.

You need to repair a package at a specific distribution point.

What it does

Builds a new, complete, compressed package file and a delta compressed package file from the updated package source files. The delta file is passed to all distribution points.

Recopies the compressed package from the local site server to the distribution point but does not copy files from the package source.

Resets access control list (ACL)?

No.

Yes, if you have made changes to the Package Access Accounts.

Resets the Virtual Directory?

Yes, if you have enabled or disabled BITS on the distribution point since the last package update.

Yes, if you have enabled or disabled BITS on the distribution point since the last package refresh.

Updates the package source version?

Yes.

No.

Increments package version in client policy?

Yes.

No.