Tagging/Untagging of Ports connected to ESXi-Host and APs (WAC729)

Hello Together,

Currently we have some really bad issues: the network is not stable an some Clients got the wrong IP-Adresses from a different VLAN. To eliminate setting-failures I couldn't find any clear answer in the manuals and now I hope you can help me :-)

1) How habe the stack-ports to be configured?

• We have 6 Switches (M5300 POE and non-POE) in Stacking Mode
• 12 Stacking-Ports are configured as Stack (Link-status: UP)
• Management VLAN-Id: 100

-> We untagged "U" all used VLAN-IDs on this specific Stackports (mostly Port 51/52 or 27/28)

-> And set PVID to VLAN-ID_1 (it is interesting, that some of these stack-ports still marked with "current PVID=0"

Question: Are these settings correct?

2) Switch-Ports which are connected to a ESXi-Host (10GB-ethernet ports)

• We have several VLAN which should all be available to the VMs in the ESXi-Host
• Mangement VLAN is ID-100
• it is clear that all used VLANs have to be "tagged"

Question: 

-> Have these ports to be untagged "U" with Management VLAN (ID:100)?

-> or with VLAN-ID: 1 (default), or disabled (empty)

3) We have about 50 WAC720 controlled by a WC7600v2

• as mentioned before: Management-VLAN: 100
• Switch-Port which is connected to Controller has ID-100 untagged "U"
• Switch-Ports which are connected to a APs are tagged "T" with all used VLANs to be available in WiFi-Networks
• The management-settings for the APs are: VLAN: 100
• "Untagged Vlan" is disabled 

Question:

-> Which PVID configuration is the right one for this AP-ports?

-> Have the Management-VLAN 100 to be untagged "U" for these ports

or with VLAN-ID: 1 or empty?

-> Or has the management setting "untagged Vlan" to be set to ID 100 and PVID also to 100 (as I understand the manual, this is only for initializing for new APs hat has to be changed after APs are initialized)

Thanks for you help in advance 

Eli