Why isn't the Microsoft voice appearing in Communicator?

Microsoft Speech

Communicator supports the SAPI5 voice format.  SAPI5 is Microsoft Speech API 5.  It was the Microsoft standard speech format for text to speech from Windows XP through Windows 8.  Windows 10 introduced Windows Mobile Voices.  There are many more Windows Mobile Voices that come with Windows 10 than SAPI5 voices.  The Windows Mobile Voices are not compatible with Communicator and will not appear under the list of voices.

Below is a list of the voices that come with Windows along with their formats.  Communicator compatible voices are green.  Voices not compatible with Communicator are purple.
 

Windows 8 SAPI5 Voices

Korean Heami

US English David

UK English Hazel

US English Zira

Spanish Helena

French Hortense

German Hedda

Japanese Haruka

Chinese (simplified) Hanhan and Huihui

Windows 8.1 and 10 SAPI5 Voices - all the above plus:

Mexican Spanish Sabina

Indian English Heera

Chinese (traditional) Tracy

Italian Elsa

Polish Paulina

Portuguese Maria (possibly Brazilian)

Russian Irina

Windows 10 Mobile Voices

Arabic Hoda & Naayf

Brazilian Portuguese Daniel & Maria

Bulgarian Ivan

Catalan Herena

Chinese (Simplified) Kangkang, Huihui & Yaoyao

Chinese (Traditional, Hong Kong SAR) Danny & Tracy

Chinese (Traditional, Taiwan) Zhiwei, Yating & Hanhan

Croatian Matej

Czech (Czech Republic) Vit

Danish Helle

Dutch Frank

English (Australia) James & Catherine

English (Canada) Richard & Linda

English (Great Britain) George, Hazel & Susan

English (India) Ravi & Heera

English (Ireland) Shaun

English (United States) David, Mark & Zira

Finnish Heidi

Flemish (Belgian Dutch) Bart

French (Canada) Claude & Caroline

French (France) Paul, Hortence & Julie

German (Germany) Stefan, Hedda & Katja

German (Switzerland) Karsten

Greek Stefanos

Hebrew Asaf

Hindi Hemant & Kalpana

Hungarian Szabolcs

Indonesian Andika

Italian Cosimo & Elsa

Japanese Ichiro, Ayumi & Haruka

Malay Rizwan

Norwegian Jon

Polish Adam & Paulina

Portuguese (Portugal) Helia

Romanian Andrei

Russian Pavel & Irina

Slovak Filip

Slovenian Lado

Korean Heami

Spanish (Spain) Pablo, Helena & Laura

Spanish (Mexico) Raul & Sabina

Swedish Bengt

Tamil Valluvar

Thai Pattara

Turkish Tolga

Vietnamese An

Additional information can be found at:
https://www.webbie.org.uk/blog/microsoft-speech/
https://www.webbie.org.uk/texttospeech.htm