What Reviewers Can Do With Delegated, Reassigned, or Forwarded Reviews

When you delegate a review item, the user you delegate it to can make decisions about access in the same way as you the original owner can. An important point about delegated items is that they show up for the new reviewer as a work item under the My Work > Work Items menu rather than in an access review. In the Work Items listing, the reviewer clicks View to review to open the review page.
The user can make the same kinds of review decisions in the work items view as a reviewer might make in the Access Reviews view, for example they can approve, revoke, revoke account, and allow exceptions.
The reviewer can choose to decide on only some of the items you have delegated. Once they have made and saved their the decisions, they click Save <number> Decisions to save all their changes and enter comments. If the reviewer left any items undecided when they click Save <number> Decisions, those will revert to you and will appear on your Open tab, for you to process. The items the delegated reviewer has decided on will appear in your Review tab.
The person you delegate to also has the option to reject something that has been delegated. If someone rejects items you have delegated to them, those items will come back to you for review, and will revert to you and will appear in your Important tab.
The person you delegate can also forward the items to someone else for review. If this happens, you as the original owner will see an update in your review: you will see the name of the new owner as the delegate, rather than the name of the person you originally delegated it to.

Reassigned items appear to the new reviewer as new Access Reviews. The new reviewer can take actions on the review items in the same way as the original owner would have done, including delegating, forwarding, or reassigning the items to someone else. Certifications can be configured to limit the number of times each item can be reassigned. The default behavior for reassignments is that the original owner can not complete the signoff of the main access review until the person who the items were reassigned to has completed, saved, and signed off on their decisions.

Forwarded reviews or review items become the full responsibility of the user they were forwarded to. The new owner processes these reviews in the same way as an original owner would, with all the same options. When a review or review items are forwarded, they can no longer be recalled or acted on in any way by the person who forwarded them.