This happened to and 2 of my officemate back in 2010. Our office is located in UOA Damasara Heights top level.

we were working a bit late that day(friday night) due to some urgent project matters. 2 of us were sitting next to each other and 1 more guy just sitting in front facing directly towards us. the time was around 10ish pm then suddenly we heard the printer/fax machine printing. then our desk phone started ringing one by one. after bout 2 mins everything stops.

we continue working since we though we were brave enough coz there's 3 of us there. out of the blue we heard someone knocking on the glass door at a corridor near the entrance to our area next to the huge meeting room. bam!bam!bam!...we ignored the sound at first..then the sound became louder and louder BAM!BAM!BAM!..I stood up feeling pissed and when i turn to the glass door I saw a lady in white. pale face with a long black hair..standing on the other side of the glass door.

i yelled CABUUUUUUT!! I grabbed my car key and the 3 of us quickly head towards the reception area. unfortunately the office uses a thumbprint system. my finger print werent able to be detected by the system same goes to the other 2 frens as well. with all our might we forced the door open. when we got to the reception area, we saw the lady in white slowly (like hovering)coming towards us from the dark corridor next to the receptionist desk. i yank the door handle from the main door and 3 of us head towards the lift. from there we saw the lady stop and stare at us from the reception area. when the lift came we all went in all of us pucat n we stood in silence n once we reach car park we all straight went to our cars and balik rumah...

next following monday, we told our scary encounter to one of the marketing staff, she just smile and told us that the lady in white has been hounting the office for quite sometime and that's why no one work in the office after 9pm..