Office 365 help with tasks

Dear Experts,
I need some help re the following issue:
 In-Place-Hold

I have followed the following link: https://www.experts-exchange.com/questions/28193051/How-to-add-all-online-mailboxes-to-litegation-for-7yrs-2555-days-without-hunt-and-peck.html

I have been able to successfully create it, however when I give the command Get-MailboxSearch, it shows the
InPlaceHoldEnabled: True
Status: NotStarted

Please help me to resolve.

Second issue is more of understanding related:
Let's say if i delete the user after 2 years or 1 week & I want to retrieve all of his emails, does inplacehold resolve that?
If yes, how can I get all the emails of the user?

Third, in the link above which I followed, there is a command Get-MailboxDatabase to include all the mailboxes to inplacehold, however it doesn't work.
Can you please advice what am i doing wrong?

Thanks in advance