When you search for users in the Assignee field, the Display name and Email address should be valid criteria.

However, this logic doesn't apply to custom fields like:

• Single User Picker
• and Multiple User Picker

Steps to Reproduce

• Create a User picker (single or multiple) field
• Add it to a screen
• Try to search for a user using its email address

Expected Results

Jira will return results that match based on email address.

Actual Results

No results are found. Results are only matched against the display name.

Here are some examples of what works and what doesn't:

Display Name	Email address	Searching for text	Does it work?
John Doe	jdoe@domain.com	jdoe	This should work since the text typed matches the display name
John Doe	jdoe@domain.com	jdoe@domain.com	This should work since the fix on the bug JRACLOUD-81473.
John Doe	john.doe@domain.com	john.doe	This should not work since the text typed has a special character (in this case the dot/period).

Workaround

Use the display name as search criteria.