6. Solution 3 : Hybrid
Lync Hosted Multitenant
Lync Edge Server Exchange
Active
UM
Directory SIP/TLS/SRTP SIP/TLS/SRTP Servers
Multi- SIP/TLS/SRTP
tenant Internet OWA
Servers
Lync
Edge
Server Active
Pool
Directory
AudioCodes gateway
Multi-tenant
softswitch
PSTN