I have more than one level of customer support all are using Zoho desk (I created a department for each level) .The Question is "how can I handle tickets between departments?" according to the following workflow.

Dep. A agent create a ticket and he should escalate to Dep. B (move ticket) and keep monitoring the ticket and interact using comments.

Dep. B Admin will assign the ticket to one of Dep. B agents.

-Dep. A agent ,Dep. B admin and Dep. B agent will see and monitor the ticket while it is assigned to Dep. B agent till closing it.

Please help.