Mailchimp enabled but no Mailchimp options appeared

Hy!

I've got a huge Problem - i created Mailchimp Acc. and List and integrated API and ListID in our CRM successfully. CRM told me that Mailchimp was activated and it shows me status "enabled"


BUT


i got no option in "My CRM" for creating Mailchimp Campaigns or in Groups to transfer the Group to Mailchimp. Is there any way to see if the integration was successfull just to be sure? I really don't know what happened - 3 Users got the right to create "Mailchimp Campaigns" (admin included) but nobody got any options to interact with Mailchimp.
Any suggestions for that?

Thank you!

EDIT: I was able to add the "Mailchimp Campaign" option manually to the "User Tab" but i still can't send groups to mailchimp or create a new campaign because of missing groups.

EDIT 2:

I found a Logfile with actions for Mailchimp. It says that i need Http Authentication for the "getAccount" request by the service. I tried to call the link and needed to login as CRM Admin. Where do i set this admin Login in CRM? Maybe this is the Problem?


Mai 9 2017 12:29:14.388 14808 16924 5 Mailchimp URL: server1:80/.../getAccount. Response:

<html><head><title>Apache Tomcat/7.0.68 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 401 - Full authentication is required to access this resource</h1><HR size="1" noshade="noshade"><p><b>type</b> Status report</p><p><b>message</b> <u>Full authentication is required to access this resource</u></p><p><b>description</b> <u>This request requires HTTP authentication.</u></p><HR size="1" noshade="noshade"><h3>Apache Tomcat/7.0.68</h3></body></html>