SYMPTOM:
When adding an Email addresses with an apostrophe and trying to add it to the recipients list, the following error occurs in Strategy Web 9.x.

Please enter a valid value for 'Physical Address'.
CAUSE:
This is a known issue in Strategy Web 9.x.
ACTION:
Contact Strategy Technical Support for an update on the status of this issue.
WORKAROUND:
The email address can be entered from Strategy Desktop 9.x.