function readOnly(count){ }
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
+ Start a Discussion
Linh Tran 12Linh Tran 12 

How do I automate an email any time an opportunity is in a specific stage "engage" for 90 days?

Katie NixKatie Nix
Workflow Rules. Create a rule that triggers when the stage is set to Engage, then set a time-based action for 90 days from now. 

This FAQ should be helpful as well: https://help.salesforce.com/articleView?id=000005245&type=1

Will the pending actions in the queue ALWAYS trigger?
No. Time-dependent actions remain in the Workflow Queue until processed or the rule criteria for the Workflow Rule are evaluated as "false." If a record no longer matches the rule criteria when the rule is evaluated, Salesforce removes the time-dependent actions queued for that record.
 
Example: An Opportunity Workflow Rule may specify:
A criteria set to "Opportunity: Status not equals to Closed Won, Closed Lost."
An associated time-dependent action with a time trigger set to 7 days before the Opportunity close date. If a record matching the criteria is created on July 1st and the Close Date is set to July 30th, the time-dependent action is scheduled for July 23rd. However, if the Opportunity is set to "Closed Won" or "Closed Lost" before July 23rd, the time-dependent action is automatically removed from the queue.