Cannot Edit Masked Email Entry

ag_chantelle I am reading all I can about Masked Email integration between the two service providers before deciding whether to change my current manual mode of achieving similar

One thing which does concern me, and not just on the Masked Email topic, is 1P does add sexy, new features, but does not make sufficient effort with the migration pathway for existing logins

I like the strategy: "If you are on a page where you're attempting to change your existing email address to a masked one, we recommend creating the masked email in Fastmail directly and then copying it to paste into the email change form of the site you're on."

but where do I find notes about migrating existing logins on https://support.1password.com/fastmail/ It's all about the new, with no regard for existing logins

I have 490 login items in my personal subset of 1P for Families. I have spent several hours scratching around in various https://1password.community/discussion topics using search string 'Fastmail' in order to piece together critical pieces of information, such as

• we don't impose any limits on the 1Password side, but there are some limits from the Fastmail side: The first 50 can be created with no restrictions. After that there is a limit of 5 per day, and 10 per week

As a 1P subscriber, and a user since 1P version 4, I would like to see much better documentation for the migration path