Yes UCS works finde.
Ah ok missing Parameters
i tryed
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=62univention-portal,cn=ldapacl,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=univention-portal,cn=udm_syntax,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=portals/portal,cn=udm_module,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=portals/category,cn=udm_module,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=portals/entry,cn=udm_module,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=portals/folder,cn=udm_module,cn=univention,dc=dom,dc=stone”
ldapdelete -x -D “cn=admin,$(ucr get ldap/base)” -y /etc/ldap.secret “cn=portals/all,cn=udm_module,cn=univention,dc=dom,dc=stone”
The COMMANDs are working now !!
I tryed again = univention-upgrade --ignoressh --ignoreterm
Checking for release updates: found: UCS 5.0-0
Do you want to update to 5.0-0 [Y|n]? y
Starting update to UCS version 5.0-0
Starting /tmp/tmphkBSGY/preupXz4Y6J.sh (Mit Okt 27 05:01:35 CEST 2021):
HINT:
Please check the release notes carefully BEFORE updating to UCS 5.0-0:
English version: UCS 5.0 Release Notes
German version: UCS 5.0 Release Notes
Please also consider documents of following release updates and
3rd party components.
Do you want to continue [Y/n]? y
Checking adc_mapping … OK
Checking adc_multiinstance_mapping … OK
Checking architecture … OK
Checking blocking_apps … OK
Checking default_master_packages … OK
Checking disk_space … OK
Checking failed_ldif … OK
Checking for_postgresql94 … OK
Checking hold_packages … OK
Checking kernel … OK
Checking kolab_schema … OK
Checking ldap_connection … OK
Checking ldap_schema … OK
Checking legacy_objects … OK
Checking master_version … OK
Checking md5_signature_is_used … OK
Checking min_version … OK
Checking minimum_ucs_version_of_all_systems_in_domain … OK
Checking old_packages … OK
Checking overwritten_umc_templates … OK
Checking ox_schema … OK
Checking package_status … OK
Checking python_ucr_template_compatibility …
OK
Checking python_ucsschool_import_hook_compatibility … OK
Checking role_package_removed … OK
Checking samba_server_schannel … OK
Checking samba_tdb_size … OK
Checking slapd_on_member … OK
Checking ssh … OK
Checking system_date_too_old … OK
Checking system_role … OK
Checking term … OK
Checking tls_public_key_size … OK
Checking tls_public_key_size_ucs-sso … OK
Checking usr_mountpoint … OK
Checking valid_machine_credentials … OK
Several LDAP objects are no longer supported with UCS 5 and are removed automatically.
An LDIF file of removed objects is available: /var/univention-backup/update-to-5.0-0/removed_with_ucs5_2021-10-27-07.ldif
Removing objects with obsolete objectClasses(structuralObjectClass=univentionAdminUserSettings)
(structuralObjectClass=univentionPolicySharePrintQuota)
(structuralObjectClass=univentionXConfigurationChoices)
(structuralObjectClass=univentionMailQuota)
(structuralObjectClass=univentionPolicyAutoStart)
(structuralObjectClass=univentionPolicyThinClient)
Deleting object(s) with dn: cn=default-settings,cn=thinclient,cn=p
… now the CHECKING works 
Thank you i hope the Upgrade to 5.0 is now runing
Thank you very much Regards Stone