Mismatch in signature templating

as reported in https://forum.kopano.io/topic/126/outlook-signature-sync-from-webapp-is-not-equal

WebApp generated
[ok]

{firstname} Firstname
[ok]{initials} WEI
[ok]{lastname} Lastname
[ok]{displayname} Firstname Lastname
[ok]{title} Teamleiter IT
[ok]{company}
[ok]{department} EDV
[ok]{office}
[ok]{assistant}
[ok]{phone} +49 (0) 2222 2222-222
[ok]{primary_email} firstname.lastname@domain.de
[ok]{address}
[ok]{city}
[ok]{state}
[ok]{zipcode}
[ok]{country}
[ok]{phone_business} +49 (0) 2222 2222-222
[ok]{phone_business2}
[ok]{phone_fax}
[ok]{phone_assistant}
[ok]{phone_home} 0111/1111111
[ok]{phone_home2}
[ok]{phone_mobile}
[ok]{phone_pager}

Outlook generated
[ok]{firstname}

Firstname
[Different initials? WEI is stored in AD, not P.W.]

{initials}

P.W.
[ok]

{lastname}

Lastname
[ok]

{displayname}

Firstname Lastname
[Empty?!]

{title}

[ok]

{company}

[ok]

{department}

[ok]

{office}

[ok]

{assistant}

[ok]

{phone}

+49 (0) 2222 2222-222
[ok]

{primary_email}

firstname.lastname@domain.de
[ok]

{address}

[ok]

{city}

[ok]

{state}

[ok]

{zipcode}

[ok]

{country}

[ok]

{phone_business}

+49 (0) 2222 2222-222
[ok]

{phone_business2}

[ok]

{phone_fax}

[ok]

{phone_assistant}

[Space after prefix?!]

{phone_home}

0111 /1111111
[ok]

{phone_home2}

[ok]

{phone_mobile}

[ok]

{phone_pager}

The title has previously been fixed. The differenct in the phone_home and initials still needs to be investigated.