PjSessionID cookie is null for some users?

[pavel.gz]

Hello,

I am trying to access PDS from my own web page using the cookie, that I
get from PWA login. My page is in the PWA folder. On the page I take
this value: Request.Cookies["PjSessionID"].Value and make a request to
PDS using it as an authorization cookie.

For most of users this works fine. However, for some users this cookie
is null (it appears that PWA doesn't write it at all during their login
procedure). All the security setting in IE are the same on every
computer. All users use Windows authorization to access the PWA.

Is there any solution to this problem?

Thanks in advance,
Pavel