Filtering by “blocked from online booking” would also be useful --> to check whether all those customers should still be blocked.

In addition to deleting, I would also like to be able to filter the customers themselves, for example, how long they haven't been or what treatment they came for. For example, I can come up with a customized campaign for top customers in the past.

Now that can be done automatically, but then it's the same action for every 'lost' customer.

It is now possible to have all inactive customers automatically removed after 2 years of inactivity via

Settings > Customer > Advanced > Automatically remove customers after 2 years of inactivity.

Another very nice improvement that should ensure that the customer base can remain organized 👍

Easy to find duplicates by name/email etc...

but also, for example, easily find fiches that are too short for a specific field, e.g. all fiches without an email address, without a family name, etc.

for Els Vijverman

or be able to filter before mailing, such as at the dentist

Or to be able to find new customers quickly. (Marja Van der Linden)

indeed, not only to remove customers but also to be able to create a customer list of times without a certain service or sale.