Any way to mass delete members found in validation tab? 

Yes, it would be very handy to have checkboxes alongside each one with a checkbox at the top to tick all tick none.

It's a huge job having to delete each one and then press okay and then delete the next one and press okay

ACP- System- Login & Registration. On the Registration tab look for the option to remove unvalidated members after X days.

There is no "Validating group", but there is a filter option to show validating users. Unfortunately there is no option to mass-moderate members (yet at least), but the setting GlenP pointed you to may be a suitable stopgap.

2 hours ago, bfarber said:

but the setting GlenP pointed you to may be a suitable stopgap.

That appears to have been removed in 4.4.1

 

32 minutes ago, Larry Kachadorian said:

That appears to have been removed in 4.4.1

No. You have set your registrations to “no”, so the options that require a “yes” will be hidden. 

Doh !!  Test site ... didn't actually look at complete settings  which are different from our production site (which is being upgraded tonight)  ....    

13 hours ago, GlenP said:

ACP- System- Login & Registration. On the Registration tab look for the option to remove unvalidated members after X days.

It's already set to 10 days and i still see people from 2018 😞 

 

Problem with current users are from spam validation members. They don't get deleted and need multi-select option to selection ALL option for it. 

Are these accounts being flagged as spammers? We dropped admin approval after 14 years when 4.x came out so I'm not familiar with it now.

If they are flagged, do an advanced search in ACP-Members using the cog wheel on the right. Leave all the fields open and when the search is completed, select the Spammers filter

then use the Prune tool below it to get rid of them.

A member awaiting validation may not get pruned if they've actually used their account (which could have happened due to bugs in previous versions for instance). If you have any legacy registrations sitting around in queue you can manually clean those up.