Lync dropping calls- event 32163

Question

We have (2) Ent. Fe's on latest CU with (2) SQL BE including mirroring + witness for a small deployment. Every so often we get users reporting dropped calls. It appears to me that the users are being switched between the FE's, but why?
Looking in the Event logs for the 2 FE's we see the following:
FE1
Log Name:      Lync Server
Source:        LS User Services
Date:         
12/2/2013 7:19:10 AM
Event ID:      32163
Task Category: (1006)
Level:         Error
Keywords:      Classic
User:         
N/A
Computer:      lync13-fe1.<company>.local
Description:
Local Pool Manager has been disconnected from Pool Fabric Manager.
Cause: This may happen if many Front-Ends in the cluster have gone down or become unreachable, causing loss of quorum.
Resolution:
Ensure that a majority of the Front-Ends configured for this pool are up and running. If multiple Front-Ends have been recently decommissioned, run Reset-CsPoolRegistrarState -ResetType QuorumLossRecovery to enable the Pool to recover from Quorum
Loss and make progress.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="LS User Services" />
    <EventID Qualifiers="50158">32163</EventID>
    <Level>2</Level>
    <Task>1006</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-12-02T15:19:10.000000000Z" />
    <EventRecordID>13051</EventRecordID>
    <Channel>Lync Server</Channel>
    <Computer>lync13-fe1.<company>.local</Computer>
    <Security />
  </System>
  <EventData>
  </EventData>
</Event>
Log Name:      Lync Server
Source:        LS Storage Service
Date:         
12/2/2013 7:19:12 AM
Event ID:      32034
Task Category: (4006)
Level:         Warning
Keywords:      Classic
User:         
N/A
Computer:      lync13-fe1.<company>.local
Description:
Primary Storage Service host not found for a Storage Fabric Service ID: 1673DC96160257E38E03FFBA7C877C14.
1673DC96160257E38E03FFBA7C877C14
Cause: A call to windows fabric to query for this storage fabric service returned null.
Resolution:
This condition means a caller of storage service is sending in stale references. The situation should auto correct itself. If the problem persists, notify your organization's support team with the event detail.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="LS Storage Service" />
    <EventID Qualifiers="36774">32034</EventID>
    <Level>3</Level>
    <Task>4006</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-12-02T15:19:12.000000000Z" />
    <EventRecordID>13052</EventRecordID>
    <Channel>Lync Server</Channel>
    <Computer>lync13-fe1.<company>.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>1673DC96160257E38E03FFBA7C877C14</Data>
  </EventData>
</Event>
FE2
Log Name:      Lync Server
Source:        LS User Services
Date:         
12/2/2013 7:19:24 AM
Event ID:      32167
Task Category: (1006)
Level:         Information
Keywords:      Classic
User:         
N/A
Computer:      LYNC13-FE2.<company>.local
Description:
Primary frontend for routing group {31334115-674A-5EE7-ACEE-C81121B8E01F} has been changed from lync13-fe1.<company>.local to LYNC13-FE2.<company>.local.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="LS User Services" />
    <EventID Qualifiers="17390">32167</EventID>
    <Level>4</Level>
    <Task>1006</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-12-02T15:19:24.000000000Z" />
    <EventRecordID>11425</EventRecordID>
    <Channel>Lync Server</Channel>
    <Computer>LYNC13-FE2.<company>.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>{31334115-674A-5EE7-ACEE-C81121B8E01F}</Data>
    <Data>lync13-fe1.<company>.local</Data>
    <Data>LYNC13-FE2.<company>.local</Data>
  </EventData>
</Event>
have checked the network and everything else.  I don't see why it tries switching over?
running:
Get-CsPoolFabricState gives the following for the pool (not during the episode)
Replica Instances for MCUFactory Service
    Address: LYNC13-FE1.<company>.LOCAL - Primary: 3 Secondary: 3
    Address: LYNC13-FE2.<company>.LOCAL - Primary: 3 Secondary: 3
Replica Instances for ConferenceDirectory Service
    Address: LYNC13-FE1.<company>.LOCAL - Primary: 1 Secondary: 0
    Address: LYNC13-FE2.<company>.LOCAL - Primary: 0 Secondary: 1
Replica Instances for Routing Service
    Address: LYNC13-FE1.<company>.LOCAL - Primary: 8 Secondary: 8
        Local Groups: Primary: 8 Secondary: 8
        Remote Groups: Primary: 0 Secondary: 0
    Address: LYNC13-FE2.<company>.LOCAL - Primary: 8 Secondary: 8
        Local Groups: Primary: 8 Secondary: 8
        Remote Groups: Primary: 0 Secondary: 0
Replica Instances for LYSS Service
    Address: LYNC13-FE1.<company>.LOCAL - Primary: 7 Secondary: 8
    Address: LYNC13-FE2.<company>.LOCAL - Primary: 8 Secondary: 7
Service: fabric:/lync/storage/10613DBEC9445463BFA37C1EA28D0EB9 has no primaries.
Global Service Count Summary:
Fqdn: LYNC13-FE1.<company>.LOCAL - Primary: 19 Secondary: 19
Fqdn: LYNC13-FE2.<company>.LOCAL - Primary: 19 Secondary: 19
We are near the end of migrating from Lync 2010 but that is still running.

Answer 1

Here is what I ran and the errors received:
Reset-CsPoolRegistrarState -PoolFqdn "Lync13.<company>.com" -ResetType FullReset
Resetting Pool Fabric State.
Initiating Full Pool Reset on Pool Lync13.<company>.com. This will cause User Data to be re-loaded from Backup Store
for all Routing Groups and any uncommitted data might be lost. This is a very expensive operation as all Databases need
 to be re-built.
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): y
Reset-CsPoolRegistrarState : Cannot find path '\\Lync13-fe2.<company>.local\C$\ProgramData\Windows
Fabric\\Settings.Xml' because it does not exist.
At line:1 char:1
+ Reset-CsPoolRegistrarState -PoolFqdn "Lync13.<company>.com" -ResetType FullRese ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (\\Lync13-fe2.ld...c\\Settings.Xml:String) [Reset-CsPoolRegistrarState],
    ItemNotFoundException
    + FullyQualifiedErrorId : PathNotFound,Microsoft.Rtc.Management.Hadr.ResetPoolFabricStateCmdlet
Reset-CsPoolRegistrarState : Cannot find path '\\Lync13-fe2.<company>.local\C$\ProgramData\Windows
Fabric\\Settings.Xml' because it does not exist.
At line:1 char:1
+ Reset-CsPoolRegistrarState -PoolFqdn "Lync13.<company>.com" -ResetType FullRese ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Reset-CsPoolRegistrarState], ItemNotFoundException
    + FullyQualifiedErrorId : Error resetting fabric state. For details, see inner exception.,Microsoft.Rtc.Management
   .Hadr.ResetPoolFabricStateCmdlet