How to filter result in PowerShell

A lot better but in Identity column how can I get the whole info?

Because i got something like this with 3 dots at the end: Shared Mailbox/Lab...

Well you have several options:

$perms = Get-MailboxPermission john.doe| Where-Object {$_.isinherited -eq $false}

$perms.Identity

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(Get-MailboxPermission john.doe | Where-Object {$_.IsInherited -eq $false}).identity

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Get-MailboxPermission john.doe | Where-Object {$_.IsInherited -eq $false} | Select-Object -ExpandProperty Identity

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To name a few.

But I want to keep the same info  and result format as you suggest in the first answer: User,AccessRights,Identity,IsInherited

Get-MailboxPermission –identity * | fl user, identity, accessrights

Following article contains more options for this command

https://blogs.msdn.microsoft.com/deva/2012/04/15/exchange-server-2007-2010-how-to-query-user-mailboxes-its-permissions-using-exchange-powershell/

Thanks for the explanations.

In my case the Identity names are all in one line even with Identity.Name. Is there a way to have it separately at least?

Sorry, can't follow you.
Your example retrieves the mailbox permissions for one mailbox with the identity "UserMydomain.com". This is one single identity, and accordingly, there should be one single identity for each ACE listed.
I'm not really an Exchange administrator, and I can't reproduce "Identity names are all in one line even with Identity.Name". You need to elaborate here on the actual command you're using and its output.

I have enough info to continu. Thanks to all!